No Things shown after Restart

Hi, I restarted my openhabian Installation and after that no Things are shown in PaperUI.
I have a Backup, but I’m not sure, if I can reimport the things configuration…

Has anyone an idea, what I can check?

Thanks a lot!

Check JSONDB /var/lib/openhab2/jsondb/org.eclipse.smarthome.core.thing.Thing.json, there’s also a directory to contain backup of that file there.