Hi, I just started having this issue as well on one of my policies.
Only difference is mine says Ending 1 instead of ending 0.
We are running 13.1.0.6 Build 0.61.3.
Is it possible to identify which ending is ending 0 for example, then delete the ending in tmsh? Like Martijn said, we cannot edit through the GUI as that is where the error is.
Just an update.. I made a copy of my policy that was having issues
I went into tmsh and looked around at my apm agent policies with endings, they all looked fine.
I went ahead and deleted a couple of my deny endings that have URL redirections using.
delete apm policy policy-item *policyname*_end_*policyendingname*
I'm not sure why deleting these worked, but I am able to now open the edit menu.
However, when I try to re-add them, or any type of ending with the redirect option, the issue comes back with the edit menu.
If I try to add a redirect ending to any other policy, the issue starts occurring.