If I had your ticket I would do:
1. I will suggest you to make a backup of your ePO, database, and ENS policies.
2. I will uninstall the extension through the ePO console, and I might restart the server and reproduce the problem:
If it did not work, and I would manually remove the extension directly on your sql (this internal kb should have been sent by your technical support engineer), and then once again, reboot, and reproduce, it that did not work I would unzip the package that contains the extension, it also contains a folder to run some "uninstall" queries, then restart, reproduce, if it also did not I would follow these articles:
How to enable Log Level 8 for ePolicy Orchestrator troubleshooting
Technical Articles ID: KB56207How to enable debug logging and log size for Orion.log in ePolicy Orchestrator
Technical Articles ID: KB52369
then, I will install once again the extension, and then restart, reproduce, gather a MER for further investigation.