Symptoms
Upon attempt to change Plesk administrator password via CCPv1, "Please wait" indicator keeps spinning forever and screen never refreshes. Despite that, browser dev tools confirm code 200 for request POST changeAdminPassword. The password is changed inside of Plesk - that could be checked by logging in to Plesk directly.
There are no errors in browser console during this operation. Additionally, in CCPv2 admin password change works as expected.
Cause
Software-related issues CCU-17531 was recognized as the root cause.
Resolution
As the workaround please use CCPv2 to change Plesk password.
In order to track status of CCU-17531 please contact your Technical Manager.