Error while listing files in folder User may not have permissions to access this folder. Errno is 0

Hello,
Every few days I get the following error until I restart the machine.

As I understand, I am not the only one with such a problem and I did not see a solution here on the forum.

Client - Debian 11

2024-04-16 11:42:43(info): Starting unscheduled incremental file backup…
2024-04-16 11:42:45(info): Snapshotting device /dev/sda1 via dattobd…
2024-04-16 11:42:45(info): Trying to transition /dev/datto0 to snapshot…
2024-04-16 11:42:45(info): dbdctl transition-to-snapshot /srv/dev-disk-by-uuid-93e35851-cc68-438f-9ad6-da832d0499e7/datto_3d41c58e-6724-4d47-8981-11c766a08a24_a386acae8f0080b229e19ac973d06c62321c3c6abf60a576 0
2024-04-16 11:42:45(info): Transitioned /dev/datto0 to snapshot.
2024-04-16 11:42:45(info): Mounting /dev/mapper/wsnap-a386acae8f0080b229e19ac973d06c62321c3c6abf60a576…
2024-04-16 11:42:45(info): Using datto change information from /srv/dev-disk-by-uuid-93e35851-cc68-438f-9ad6-da832d0499e7/.datto_3d41c58e-6724-4d47-8981-11c766a08a24_47d48b20aa102a0b16d33e704b244bafa297cb750a7c2e04
2024-04-16 11:42:45(info): Scanning for changed hard links on volume of “/srv/dev-disk-by-uuid-93e35851-cc68-438f-9ad6-da832d0499e7”…
2024-04-16 11:42:45(error): Error while listing files in folder “/mnt/urbackup_snaps/a386acae8f0080b229e19ac973d06c62321c3c6abf60a576”. User may not have permissions to access this folder. Errno is 0
2024-04-16 11:42:45(info): Unmounting /dev/datto0 at /mnt/urbackup_snaps/a386acae8f0080b229e19ac973d06c62321c3c6abf60a576…
2024-04-16 11:42:45(info): Removing devicemapper snapshot…
2024-04-16 11:42:45(info): Transitioning dattobd snapshot /dev/datto0 to incremental…
2024-04-16 11:42:45(error): Indexing files failed, because of error
2024-04-16 11:42:45(error): Constructing of filelist of “xxxxxyyyyyyy” failed: error - index error
2024-04-16 11:42:53(error): Backup had an early error. Deleting partial backup.