[BUG] Customize Plesk URL configured with a specific domain or subdomain doesn’t work correctly: all domains show Plesk login page

Symptoms

All domains on a Plesk server are showing Plesk login page when option The specified domain or subdomain that resolves to the server IP address but is not used for hosting is enabled in Tools & Settings > Customize Plesk URL

Cause

This is Plesk bug ID #PPPM-12289 which is going to be fixed in future Plesk updates.

Resolution

Until the bug is fixed, use the following workaround: disable the customized Plesk URL so that Plesk GUI is only accessible via port 8443:

1. Log in to Plesk GUI

2. Go to Tools & Settings > Customize Plesk URL > Select the option No custom URLs: Only https://<server-IP-or-hostname>:8443 >
   
   

3. Click OK to apply the changes