Unable to edit certain files in Plesk File Manager when Plesk URL page is served by Cloudflare: user is forcefully logged out from Plesk

Symptoms

• On attempt to open a certain file in Plesk File Manager, the user is forcefully logged out from Plesk without the ability to log in back on the same page.

• The Plesk URL login page is served by Cloudflare:

  nslookup example.com

  Name: www.example.com.cdn.cloudflare.net
  Addresses: 104.28.22.73
  104.28.23.73

• If the server IP address is used as a login URL (https://203.0.113.2:8443 ), the issue is not reproduced.

Cause

Cloudflare settings prevent opening certain files.

Resolution

Contact Cloudflare support for troubleshooting.

As a workaround, use one of the following options:

• Disable Cloudflare support for example.com.

• Log in to Plesk using a Plesk IP address instead of a hostname.