Nextcloud problem after upgrade

NethServer Version: 7.9.2009
Hello all, since the last update my nextcloud stopped to work, I can only see these errors in nextcloud logs :
Error: fopen(/var/lib/nethserver/nextcloud/7a24f9ae-8122-1038-9de4-8fb1afc488fc/files/Photos/ failed to open stream: No such file or directory at /usr/share/nextcloud/lib/private/Files/Storage/Local.php#363
Error: disk_free_space(): No such file or directory at /usr/share/nextcloud/lib/private/Files/Storage/Local.php#381

I’m sure it’s not a disk space error, I still have 200 GB of free space… On the web interface folders have vanished and I can only see 4 files…
What can I try to solve it?

Closed as a duplicate of Nextcloud problems after update