You notice that DLP Enforce CloudSOC Gateway policies stopped working.
In CloudSOC / Settings / Data Loss Protection - Connector was set for Cloud DLP and the DLP Enforce Connector was deactivated by Client
You can deactivate CloudSOC / Settings / Data Loss Protection / Cloud DLP
Then activate CloudSOC / Settings / Data Loss Protection / DLP Enforce connector
Test again to verify if you are able to trigger DLP Enforce policy.