Upgraded to openhab 3.2 from 3.1.1 now it does nothing anymore?!?

Dear all,

I upgraded to 3.2 from 3.1.1 using openhabian-config. The issue I now have is that the UI does not start and it appears not to do anything else anymore either. The log file openhab.log just shows:

2021-12-20 23:30:33.492 [INFO ] [org.openhab.ui.internal.UIService   ] - Started UI on port 8080

but going to the page just brings up an empty page, not even a 404 or connection error. Events.log is just completely empty.

Any idea how to fix?
How would I go about downgrading to 3.1.1 again?

Thank you,

Ramon