The PAM appliance's HDD is full or close to being full
Release : All versions
Component : PRIVILEGED ACCESS MANAGEMENT
There were logs on the appliance which were growing to large sizes.
Ultimately if the filesystem is full, PAM might not be able to function or start correctly.
A reboot of the filesystem might help because it traditionally blanks out the /tmp to /var/tmp file system.
If not you will have to extend the filesystem.
Traditionally the root cause of most of these problem is tracing is left on. .
Especially if the PAM UI >> Configuration >> Diagnostics >> Diagnostic Logs >> Log Levels >> Web Service Logs Level is left on Debug.
Leaving this on for an extended or even a short period of time can fill the file system. If on, turn back to Error.
Nonetheless, please open a support case and support will SSH into the filesystem and determine what files are the root cause.