Thanks for the confirmation @rlkoshak, if it’s reproduceable, it’s most likely a bug with openHAB2 but hopefully if we can past this loading ui stage then all will be well.
It’s a shame you’re coming across these issues @zarusz. I’d stop openhab and delete the contents of /var/lib/openhab2/cache and /var/lib/openhab2/tmp before restarting it, hopefully that has some effect.