I'm trying to acknowledge a notification but I got the following error:
When I verified the message log in the Notifications Server I saw the following errors:
The error is occurring since weeks but I'm not sure if this two errors are related to each other.
I don't have any clue of the root cause of these errors since they are not specific. I only have 5 notifications configured and they are running without errors (at least that is what I see from the PI System Explorer).