Migration OH2 to OH3 - Unknown errors - no more ideas

Then something else is going wrong and there’s no reason to expect uninstalling it some other way would be successful. There are almost certainly going to be some errors logged in the console on the browser and probably some in openhab.log too when attempting to load this page.

At this point, there is too much going wrong all at once. Debuging all of this is just causing us to chase our tails. I recommend starting with a brand new clean OH 3 installation.

Then bring over the config from 2.x little by little. One Thing at a Time. One Item at a Time. One rule at a time.

At the first sign of an error, stop. Debug, and figure out what the error means and correct it or figure out if you can ignore it (hint, the rrd4j error is in fact something you can ignore for now).