We are experiencing a critical issue in SugarCRM where no users can open any contact records. The contact record will open for a split second, then the system displays an "Unknown Error" message.

Here is a summary of what we found:
ERROR:
POST /rest/v11_27/Contacts/ — 500 Internal Server Error (confirmed via browser console)
This occurred around the same time a mass update of 30 fields and report generation. Schedulers were also likely to be simultaneously running.
ADDITIONAL DETAILS:
- Affects all users on all contact records
- SugarCRM log shows repeated CSRF errors: "ModuleBuilder -> savetablesort"
- Quick Repair and Rebuild has been run with no errors
- Restoring previous layout versions from history has not resolved the issue
-
Version 25.2./Sell Advanced
Has anyone else experienced this issue? If so, any suggestions?