I just tried to update my system, after beeing prompted that an update is available, and got the identical message as leocortes as well as the same problems with my system now. Rebooting the system did not solve the issue.
Just have seen the other post on this matter:
Since the update within myOSMC said, no updates available, I used ssh.
After “re-updating” via SSH and rebooting the system the problem seems to be solved.