I'm trying to find the reason for following error. The event source is CMS400. Ektron version is 9.20. 

Timestamp: 4/26/2018 4:24:15 PM
Message: UserID=0
Category: Error
Priority: -1
EventId: 0
Severity: Error
Title:
Machine: {Machine Name}
Application Domain: /LM/W3SVC/2/ROOT-1-131692068008715943
Process Id: 5524
Process Name: c:\windows\system32\inetsrv\w3wp.exe
Win32 Thread Id: 6788
Thread Name: 
Extended Properties:

My guess is that some CMS component is finding that a user got logged-out, but no useful information like the URL is provided. The environment is managed cloud so examining processes and threads is not possible. Does anyone have any insight?