Putting in an invalid URI makes the settings page unusable in Moodle 4.5

[sandwormusmc]

Reproduce by:

Entering an invalid URI in the plugin settings area, click plugin settings again. Only thing shown now is "Exception - Custom endpoint some.fqdn/<something> was not a valid URI

More information about this error

Next step for me, trying to figure out where this plugin stores it's settings so I can reset it... doesn't seem to be in the database.