Issues after upgrading to 3.4

After upgrading to 3.4.3-2, I’m stuck in
“Some .kar files are not installed yet. Delaying add-on installation by 15s.”
Any hint?

I found the following issue: /var/lib/openhab2/… does not exist.

  1. Could this be problem?
  2. how to get rid of this?
  3. why is it having this reference?

Solved by purge & re-installation