When opening a WordPress website, an error appears: Fatal error: Call to undefined function rest_get_url_prefix() in /www/wwwroot/aqzy/wp-content/mu-plugins/endurance-page-cache.php on line 75. What causes this? Naiba analyzes the reasons for the endurance-page-cache.php file error causing the website to fail to open in this article. From the error message, it can be seen that the problem causing the website to fail to open is on line 75 of the file wp-content/mu-plugins/endurance-page-cache.php.
as the free Let’s Encrypt SSL certificate nears expiration.
Now that we know where the problem is, it's easier to handle.
as the free Let’s Encrypt SSL certificate nears expiration.As follows: Method 1: Use FTP software to rename or delete the file in the mu-plugins folder.

Method 2: Disable endurance page cache in the WordPress Admin Dashboard plugins section.
What is endurance page cache
After solving the problem, you might ask what the endurance page cache plugin is. Endurance page cache is a caching plugin from bluehost. If you are using bluehost hosting, it is installed by default. If you are using other hosting and want to use it, you can
go to github to download. The workflow of endurance page cache is to convert php files into html files. When a user visits, it serves the html file, thereby avoiding php execution and reducing server pressure. Naiba tested this plugin and didn't find anything special. It might require bluehost hosting for the effect to be noticeable, so it is recommended that non-bluehost users who need a caching plugin consider more widely used ones, such as wp super cache.
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