I have a problem with saving my Nintex WF. I just found a similiar Porblem in the community, but the solution didn't work for me:
This error only appears on one Sitecollection.
What I tried:
Have you any Idea?
Are you able to log the time that you experienced the error then check the ULS logs at this time filtering by Unexpected? If you do find the error in the ULS logs it should have a correlation ID in the ULS error. You should then be able filter the ULS logs by that correlation ID and remove the filter for Unexpected. This will show you all messages related to the error.
It's needle in a haystack (there may even be no needle) and there will be plenty of red herrings but it's worth digging around.