Deleting Watchdog extension won't work, cannot uninstall it

I tried accessing my Plesk Panel, and under my extension list, clicking on Watchdog, then clicking the rubbish bin shows this error:

The extension Watchdog was removed with errors: Error: GraphQL error: Internal server error.

Manually deleting the directory at /usr/local/psa/var/modules/ works, but the icon still shows up. Any suggestion is appreciated, have a nice day everyone!