What menu option do you speak of? As I mentioned earlier I made the restore from backup.zip to get back all the configuration … When I found this problem I tried to install log from openhabian-config but nothing doesn’t finish
I do not have my system available but hopefully I can steer you in the proper direction.
Run sudo openhabian-config and select 60 Manual / Fresh Setup. There should be an option there to select Frontail Log Viewer.
After the fresh install if you still have no Frontail log view then, in openhabian-config, select option 20 (Optional Components) then select 21 (Frontail log view).