The mapdb looks good. Did you stop OH and do a reboot after upgrading? When I upgraded I needed to restart and reboot OH for everything to start working properly.
To backup you only need to use sudo openhab-cli backup no stop needed. Note that if restoring from the backup you will need to stop OH then use **sudo openhab-cli restore /var/lib/openhab2/backups (or whatever path to the backup file). If your wanting to stop OH use sudo systemctl stop openhab2 and sudo systemctl start openhab2 for starting.
Maybe try cleaning the cache to see if that helps.