Answered "Code: 200 OK" error after 2.5.1 upgrade

My limited accounts are seeing this error when trying to save a resource after I updated to 2.5.1 yesterday:

Code: 200 OK
{"success":false,"message":"Permission denied!","total":0,"data":[],"object":[]}

Admin accounts do not see it. I have looked at other threads about this error and all of the suggested permissions on the access policy are enabled. I was wondering if anyone has a tip on how to track down exactly which permission is causing the error? I have not had any luck with the MODX error log.

I should note, the resource saves successfully, they just get this annoying error popping up after clicking the Save button.