Have you ever encountered the frustrating error message “wordpress failed opening required”? Don’t worry, you’re not alone. In this article, we will guide you through the steps to fix this issue, so you can get your WordPress website up and running smoothly again. Whether you’re a seasoned developer or just starting out, our friendly instructions will help you troubleshoot and resolve this common problem. So let’s get started and solve the “wordpress failed opening required” error once and for all!
1. Check File Permission
1.1. Understanding File Permissions
File permissions play a crucial role in the proper functioning of your WordPress site. They determine who can read, write, or execute files on your server. When troubleshooting the “WordPress Failed Opening Required” error, it is essential to check the file permissions.
File permissions are represented by a three-digit code, such as 644 or 755. Each digit represents a different group of users: the owner, the group, and others. The first digit defines the permission level for the owner, the second for the group, and the third for others.
To resolve any file permission issues, you need to understand what each permission level means. The most common ones are:
- Read (r): Allows users to view the content of a file.
- Write (w): Enables users to modify or delete a file.
- Execute (x): Grants users permission to execute a file, typically applicable to script files.
By checking and adjusting the file permissions, you can ensure that the necessary files required by WordPress are accessible and functional.
1.2. Resetting File Permissions
In some cases, file permissions may have been mistakenly changed, leading to the “WordPress Failed Opening Required” error. To reset the file permissions to their default settings, you can use FTP (File Transfer Protocol) or a file manager tool in your hosting control panel.
Using FTP, connect to your server and navigate to the WordPress installation directory. Right-click on the folder containing the files you wish to modify and select “File Permissions” or “CHMOD” (Change Mode). Make sure to set the permissions to the recommended values based on your hosting provider’s guidelines.
For most files, set the permissions to 644 or 640, and for directories, set the value to 755 or 750. This ensures that the owner has full read, write, and execute permissions, while others have appropriate read and execute permissions.
1.3. Changing File Ownership
Another reason for the “WordPress Failed Opening Required” error could be incorrect file ownership. File ownership determines which user or group has control over a file or directory. If the ownership is incorrect, WordPress might face difficulties in accessing and executing the required files.
To change the file ownership, you can use FTP or a file manager tool, similar to the method described in the previous section. Right-click on the file or folder in question, select “File Permissions,” and look for the ownership settings.
In most cases, the ownership of WordPress files should match the user under which your web server runs. It is usually “www-data,” “apache,” or the name of your hosting provider. Change the ownership to the appropriate user or group, ensuring they have the necessary read, write, and execute permissions.
2. Verify File Path
2.1. Double-checking File Paths
The “WordPress Failed Opening Required” error can also occur if the file paths specified in your code or configuration files are incorrect. It is crucial to double-check the file paths to ensure they are accurate and leading to the correct location of the required files.
Start by examining the code where the error is referencing the missing file. Look for any explicit path declarations or includes that could be causing the issue. Verify that the file paths provided are correct and reflect the actual file locations.
When providing file paths, it is essential to consider whether the code is referencing the absolute or relative path. An absolute path starts from the root directory, while a relative path is specified relative to the current file’s location. Incorrectly specified paths in either format can cause the “WordPress Failed Opening Required” error.
2.2. Correcting File Path Errors
If you identify any errors in the file paths, you need to correct them to resolve the “WordPress Failed Opening Required” error. Open the file where the error is occurring and locate the code segment that refers to the missing file. Update the file path to the correct location, ensuring it is accurate and complete.
Ensure that the file paths are specified consistently throughout your WordPress installation, especially if the website is hosted on different servers or directories. A slight variation in the file path can result in the error, so it is vital to be vigilant when making any updates or adjustments.
After correcting the file paths, save the changes and test the website to see if the error persists. If the issue is not resolved, consider further troubleshooting steps outlined in the subsequent sections.
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3. Evaluate PHP Version
3.1. Checking PHP Version
The “WordPress Failed Opening Required” error can also occur due to incompatible PHP versions. PHP is the scripting language used by WordPress, and certain plugins or themes may require specific PHP versions to function correctly.
To check your PHP version, you can use the PHPInfo function. Create a new PHP file, name it
phpinfo.php, and insert the following code:
Save the file and upload it to the root directory of your WordPress installation using FTP. Access the file through your web browser by navigating to
The PHPInfo page will display detailed information about your PHP configuration, including the PHP version. Take note of the version number, as it will help identify any compatibility issues.
3.2. Updating PHP Version
If the PHP version detected in the previous step is outdated or incompatible with your WordPress installation, it is recommended to update to a newer version. However, before proceeding with any updates, ensure that your WordPress themes, plugins, and other components are compatible with the new PHP version.
Updating the PHP version might require assistance from your hosting provider. Some providers offer tools or control panels that allow you to switch to a different PHP version. If this option is not available, you can contact their support team for guidance on updating PHP.
Before making any changes, it is crucial to create a backup of your WordPress site and database. Updating PHP can potentially lead to compatibility issues or unexpected errors, so having a backup ensures you can restore your site to its previous state if necessary.
3.3. Reverting PHP Version
If updating the PHP version does not resolve the “WordPress Failed Opening Required” error or causes other compatibility issues, reverting to the previous PHP version might be necessary.
Reverting to a previous PHP version typically involves the same steps as updating. Consult your hosting provider’s documentation or support team to find out how to switch back to the previous version.
Remember to test your WordPress site after reverting the PHP version to ensure that the error has been resolved. If the error persists, more troubleshooting steps need to be taken.
4. Review Required Files
4.1. Identifying Missing Files
When encountering the “WordPress Failed Opening Required” error, it is essential to review and identify any missing files that WordPress relies on for proper functioning.
Review the error message or log file to identify the specific file that is missing. This information will help narrow down the troubleshooting process and find a solution quickly.
In most cases, the missing file is a core WordPress file or a plugin or theme file. It is crucial to pay attention to the exact file name and its location provided in the error message.
4.2. Reinstalling or Updating Missing Files
Once you have identified the missing file, you have two primary options for resolving the issue: reinstalling or updating the file.
If it is a core WordPress file, you should consider reinstalling WordPress to ensure that all essential files are present and up to date. You can download the latest version of WordPress from the official website and follow the installation instructions to overwrite the existing files.
For missing plugin or theme files, try reinstalling or updating the respective plugins or themes. Access your WordPress admin dashboard and navigate to the Plugins or Themes section. Deactivate the problematic plugin or theme and then reinstall it by clicking on the “Add New” button or uploading the plugin/theme file manually.
After reinstalling or updating the missing files, test your WordPress site to confirm whether the “WordPress Failed Opening Required” error has been resolved. If the error persists, continue to the next sections for further troubleshooting.
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5. Examine File Corruption
5.1. Scanning for File Corruption
File corruption can also cause the “WordPress Failed Opening Required” error. When files become corrupted, their content is altered or damaged, leading to errors when WordPress attempts to load them.
To examine file corruption, you can use various file scanning tools or plugins available for WordPress. These tools scan the files, detect any corruption or inconsistencies, and provide suggestions for repair.
Choose a reputable file scanning tool or plugin that is compatible with your WordPress version and install it. Follow the instructions provided by the tool or plugin to initiate a file scan.
The scanning process may take some time, depending on the size of your WordPress installation and the number of files being inspected. Once the scan completes, review the results to identify any corrupted files.
5.2. Repairing Corrupted Files
If the file scan reveals any corrupted files, you can attempt to repair them to resolve the “WordPress Failed Opening Required” error. Once again, having a backup of your WordPress site and database is crucial before making any changes to the files.
There are a few methods to repair corrupted files:
Replace the corrupted file with a backup copy: If you have a recent backup of the corrupted file, replace it with the backup version. This ensures that you are using a clean and functional copy of the file.
Reinstall the plugin or theme: If the corrupted file is associated with a plugin or theme, reinstalling it may fix any corrupted files or dependencies. Deactivate the problematic plugin or theme, delete it, and then reinstall it through the WordPress admin dashboard.
Manually repair the file: If no backup is available, manually repairing the file might be necessary. This step can be more complex and requires advanced knowledge of the file structure and code. Consult the official documentation or reach out to the plugin or theme developer for guidance on file repair.
After repairing the corrupted files, test your WordPress site again to ensure that the “WordPress Failed Opening Required” error is resolved. If the error persists, further investigation is needed.
6. Evaluate Plugin Compatibility
6.1. Identifying Problematic Plugins
Plugins enhance WordPress functionality, but sometimes they can conflict with each other or the underlying WordPress system, triggering the “WordPress Failed Opening Required” error. Identifying problematic plugins is crucial for resolving this issue.
Start by reviewing the Error message or log file to determine which plugin is causing the error. The error message usually indicates the plugin’s exact file location or folder name that is failing to open. This information will help pinpoint the problematic plugin.
6.2. Updating or Replacing Incompatible Plugins
Once you have identified the problematic plugin, there are two primary solutions: updating or replacing the plugin.
First, ensure that the problematic plugin is up to date. Access your WordPress admin dashboard, navigate to the Plugins section, and check for any available updates. If an update is available, install it following the provided instructions.
If updating the plugin does not resolve the “WordPress Failed Opening Required” error, consider replacing it with an alternative plugin that serves a similar purpose. Look for plugins with positive reviews, compatible with your WordPress version, and actively maintained by the developers.
Deactivate and delete the problematic plugin through the WordPress admin dashboard. Then, install and activate the alternative plugin, ensuring it is configured correctly for your needs.
After updating or replacing the problematic plugin, test your WordPress site to confirm whether the error has been resolved. If it persists, proceed to the next sections for additional troubleshooting steps.
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7. Check Theme Compatibility
7.1. Identifying Theme Conflicts
Similar to plugins, themes can also cause conflicts and result in the “WordPress Failed Opening Required” error. Themes control the appearance and layout of your WordPress site, and incompatible or poorly coded themes may lead to errors.
To identify if a theme is causing the error, investigate the error message or log file for any references to the theme files. The message might provide the name of the theme or the exact file location that failed to open.
Once you have identified the problematic theme, it is necessary to determine whether it is incompatible with your WordPress version, plugins, or other components.
7.2. Updating or Changing Problematic Themes
If the problematic theme is outdated or incompatible, updating it might resolve the “WordPress Failed Opening Required” error. Access your WordPress admin dashboard, navigate to the Themes section, and check for any available updates for the theme.
If an update is available, install it according to the provided instructions. After updating the theme, test your WordPress site to see if the error has been resolved.
In some cases, the problematic theme might not have an available update or is not actively maintained. In such situations, it may be necessary to change to a different theme altogether.
Navigate to the Themes section in your WordPress admin dashboard and activate a default theme, such as Twenty Twenty-One or Twenty Twenty. Default themes are typically well-tested, supported, and compatible with the latest WordPress version.
Test your WordPress site with the newly activated theme to verify whether the “WordPress Failed Opening Required” error has been rectified. If the error persists, proceed to the next sections for additional troubleshooting steps.
8. Disable Conflicting Plugins and Themes
8.1. Deactivating All Plugins
If the “WordPress Failed Opening Required” error persists despite following the previous steps, it is time to disable all plugins temporarily. This action helps identify if any conflicting plugins are responsible for the error.
Access your WordPress admin dashboard and navigate to the Plugins section. Select all the plugins and choose the “Deactivate” option from the bulk actions dropdown. This will disable all active plugins simultaneously.
Test your WordPress site without any plugins activated to check if the error is resolved. If it disappears, it confirms that one (or more) of the deactivated plugins was the cause. In this case, proceed to reactivate the plugins one at a time, testing the site after each activation.
By testing the plugins individually, you can identify the specific plugin that triggers the error and troubleshoot it accordingly. Deactivate or replace the conflicting plugin to ensure smooth functionality of your WordPress site.
8.2. Switching to a Default Theme
If disabling all plugins did not resolve the error, it is necessary to rule out any theme conflicts. Switching to a default WordPress theme helps determine whether the issue is theme-related or not.
Navigate to the Themes section in your WordPress admin dashboard and activate a default theme, such as Twenty Twenty-One or Twenty Twenty. Make sure to deactivate your current theme before activating the default one.
Test your WordPress site with the default theme to see if the “WordPress Failed Opening Required” error disappears. If it does, it suggests that the previous theme was causing the conflict.
In this situation, you can reach out to the theme developer for support or consider changing to a different theme. If the error persists even with the default theme, further investigation is necessary.
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9. Clear Cache and Cookies
9.1. Using Cache Plugins
Cache plugins improve website speed and performance by storing temporary copies of web pages. However, outdated or corrupted cache files can interfere with WordPress functionality and lead to errors like “WordPress Failed Opening Required.”
If you have a cache plugin installed, it is recommended to clear the cache to rule out any cache-related issues. Access your WordPress admin dashboard, navigate to the cache plugin settings, and locate the option to clear or flush the cache.
Follow the instructions provided by the cache plugin to clear the cache completely. After clearing the cache, test your WordPress site to see if the error has been resolved. If it persists, proceed to the next step.
9.2. Clearing Browser Cache and Cookies
In addition to clearing the cache on the WordPress side, it is also important to clear your browser cache and cookies. Browsers store temporary data such as cache files and cookies to improve page loading times and remember website preferences. However, outdated or corrupted data can cause conflicts and trigger errors.
Clearing the browser cache and cookies varies depending on the browser you are using. Consult the browser’s settings or preferences menu to find the options to clear cache and cookies.
After clearing the cache and cookies, reload the affected WordPress page to check if the “WordPress Failed Opening Required” error has been resolved. If the error persists, proceed to the final step for further assistance.
10. Seek Professional Assistance
10.1. Consulting WordPress Support Forums
Sometimes, resolving the “WordPress Failed Opening Required” error requires expert advice or assistance. If you have exhausted all the troubleshooting steps without success, consulting WordPress support forums can provide valuable insights and guidance.
WordPress support forums are community-driven platforms where users and developers share their experiences, solutions, and best practices. Search for similar error descriptions or post a detailed description of your issue, including any error messages, plugin/theme details, and steps you have already taken.
Be patient and polite when seeking assistance on the forums. Provide all the relevant details to ensure that others can understand and assist you effectively. Often, experienced members or WordPress developers can help diagnose the problem and suggest additional troubleshooting steps.
10.2. Hiring a WordPress Developer or Expert
If the “WordPress Failed Opening Required” error persists despite seeking assistance on support forums, it might be necessary to hire a professional WordPress developer or expert.
WordPress developers possess extensive knowledge and experience working with various WordPress issues, including complex errors like this one. They can analyze your WordPress installation, identify the root cause of the error, and provide tailored solutions to resolve it.
When hiring a WordPress developer or expert, ensure they have a solid track record and positive reviews from previous clients or employers. Check their portfolio, certifications, and credentials to ensure they have the necessary skills and expertise. Communication with the developer or expert regarding your specific requirements and expectations is also crucial.
By seeking professional assistance, you can save time and effort in troubleshooting the “WordPress Failed Opening Required” error, ensuring your website returns to normal functionality quickly.
In conclusion, encountering the “WordPress Failed Opening Required” error can be frustrating, but with the right troubleshooting steps and assistance, it can be resolved. By checking file permissions, verifying file paths, evaluating PHP versions, reviewing required files, examining file corruption, assessing plugin compatibility, checking theme compatibility, disabling conflicting plugins and themes, clearing cache and cookies, and seeking professional assistance if needed, you can effectively address this error and ensure the smooth operation of your WordPress site.