Symptoms
- Unable to log into Plesk with administrative account while another user is already logged into Plesk with the administrative account.
- The following error appears on the Plesk GUI login page:
Error: Unable to log you on. Another user with the same username (admin) is already logged in to Plesk.
Cause
Allow multiple sessions under administrator's account option is disabled.
Resolution
Click on a section to expand
If Plesk GUI access is still possible for a user that is logged in as the Plesk administrator
1. Log into the Plesk GUI as the main admin user for Plesk
2. On the top right of the Plesk interface, press on the name of the user (Administrator in this example) and select Edit Profile
3. Check the box for Allow multiple sessions under administrator's account
4. Scroll down and press Apply
with