In this blog post, we will show you how to Fix wp-blog-header.php error in a WordPress Website. Are you trying to log in to your WordPress website dashboard but are unable to access it due to the wp-blog-header.php fatal error? Not to worry, here we will walk you through detailed step-by-step guidance on how to fix this issue.
Causes of wp-blog-header.php error in WordPress website
Typically, a fatal error in the output points to one of the following causes:
1- Compatibility issues between your theme and WordPress version.
2- Incompatibility between a plugin and WordPress version.
3- An incomplete installation or upgrade.
In this situation, you will not be able to log in to your WordPress website dashboard. You will need to use the Cpanel FTP method to access your backend file and try to deactivate/reactivate a plugin/theme or upload a fresh copy of the WordPress setup files.
How to Fix wp-blog-header.php error in WordPress website
1- To fix wp-blog-header.php error, try to deactivate all plugins and switch to a default WordPress theme (such as Twenty Twenty-Four, or Twenty Twenty-Three). Then, see if the issue persists. If not, reactivate plugins and switch back to your original theme one by one to identify the plugin or theme causing the issue. Here is how to Deactivate WordPress Plugins Using CPanel FTP
2- Enable WP_DEBUG mode in your wp-config.php file to get more detailed error messages. To do this, login to your cPanel file manager area, then go to the WordPress installed root directory, locate the wp-config.php file, right-click on it edit it, and enable WP_DEBUG Mode. After refreshing the website page, this might provide additional clues about what’s causing the issue.
3- The third, and final method is, to download a fresh copy of WordPress setup files and replace it with the old/existing ones. To do that, simply download the Wordpress setup file from here https://wordpress.org/download/ and extract the downloaded zip file.
Open the Extracted Folder and Delete the WP-Content folder only. Don’t delete any other file or folder.
Now login/access your server via FTP (using FileZilla software), or the Cpanel File Manager area in your hosting account. You will need FTP login details to access your website backend files, or hosting cpanel login details.
Go to the WordPress Root Directory On your server and delete every file except the wp-config.php file and the wp-content directory/folder. (remember don’t delete the wp-content directory/folder and wp-config.php file).
After deleting the files, go back to your PC download folder where the newly downloaded WordPress setup is located as stated above. Upload all files/folders to the WordPress root directory inside the WP-Content folder.
Remember! don’t replace the wp-config.php file and the wp-content directory with fresh files/folder.
After copying all the files, the issue should be resolved, and now you can log in to your WordPress website dashboard without any problem. That’s all. If you face any issues, feel free to ask us in the comment section box.
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