Hello - The business is reporting the error in the following screenshot:
https://www.dropbox.com/s/q562gefp1nsj5uz/cancellation%20error.jpg
Can you read this error message to identify the most likely root cause? Clearly there is a permissions error in this scenario for the TerritoryAssignmentPreSave class in the Contact plugin.
However, I'm not sure how to identify what kind of security change I need to make to fix this error?