Errors 404 on websites for some JS, CSS, images and PHP files.

Symptoms

• When browsing the website example.com, errors like the following are shown in the web browser console:

  The script from “https://example.com/wp-includes/js/wp-embed.min.js?ver=5.4” was loaded even though its MIME type (“text/html”) is not a valid JavaScript MIME type.[Learn More]example.com
  Loading failed for the <script> with source “https://example.com/wp-includes/js/wp-embed.min.js?ver=5.4”.

• In Network tab, few css or js show 404 error.

• Some specific pages show File not Found​, EG: example.com/wp-admin/profile.php​.

• Sometime the following is added at the end of the website address: /login_up.php?success_redirect_url=https%3A%2F%2Fexample.com%2F

Cause

Bug in Plesk with ID #PPP-50362 which will be fixed in one of the future updates of Plesk.

Resolution

Until the bug is not fixed, apply the following solution:

1. Connect to the server via SSH.

2. Verify the integrity of Apache configuration:

   • On CentOS/CloudLinux/RedHat servers:

     # httpd -t
     Syntax OK

   • On Debian/Ubuntu servers:

     # apachectl -t
     Syntax OK

3. If the configuration is fine, restart Apache:

   • On CentOS/CloudLinux/RedHat servers:

     # systemctl restart httpd

   • On Debian/Ubuntu servers:

     # systemctl restart apache2