The Domains page in Plesk UI is loading slowly

Symptoms

• The server has less than 100 domains
• The Domains list takes more than 20 seconds to load when all domains are listed
• UptimeRobot extension is installed and active
• Disabling the extension reduces the loading time

Cause

This time increase is expected as the UptimeRobot extension may have the need to check/scan the domains while they are being listed by Plesk.

Resolution

 Shorten the list to, for example, 10 domains per page to decrease the loading time.