Volumes not mounted, Error in app

[hpz24]

I noticed that my Calibre Web instance is no longer working because the mounted volume containing the database could not be found.
According to the dashboard, no volume was mounted at all, so I'm posting this here:

I use Syncthing for the remaining 3 volumes, and interestingly enough, there are no issues there—the app (and the shares) work as usual

There was no change in the last weeks (especially when it comes to the volumes), beside the regulary cloudron updates.

What did I try

• Server reboot
• App reloaded, same error
  Output:

Mar 30 18:55:15 apptask: createContainer: creating container
Mar 30 18:55:15 shell: mounts: mountpoint -q -- /media/calibre-library
Mar 30 18:55:15 shell: mounts: mountpoint -q -- /media/calibre-library errored BoxError: mountpoint exited with code 32 signal null
Mar 30 18:55:15 apptask: run: app error for state pending_recreate_container: BoxError: Volume "calibre-library" is not active. Not mounted
Mar 30 18:55:15 tasks: setCompleted - 3520: {"result":null,"error":{"message":"Volume \"calibre-library\" is not active. Not mounted","reason":"Bad State"},"percent":100}
Mar 30 18:55:15 tasks: updating task 3520 with: {"completed":true,"result":null,"error":{"message":"Volume \"calibre-library\" is not active. Not mounted","reason":"Bad State"},"percent":100}
Mar 30 18:55:15 taskworker: Task took 3.154 seconds
Mar 30 18:55:15 Exiting with code 0
Mar 30 18:55:15 BoxError: Volume "calibre-library" is not active. Not mounted
Mar 30 18:55:15 BoxError: Volume "calibre-library" is not active. Not mounted

• I found this case on the forum that sounds similar and tried to follow the steps, but there is no mount command with my volume id available

• cloudron-support --troubleshoot output:

Vendor: QEMU Product: Standard PC (Q35 + ICH9, 2009)
Linux: 6.8.0-106-generic
Ubuntu: noble 24.04
Execution environment: kvm
Processor: Intel(R) Xeon(R) Silver 4214 CPU @ 2.20GHz
BIOS pc-q35-10.0  CPU @ 2.0GHz x 8
RAM: 32866148KB
Disk: /dev/sda2       541G
[OK]	node version is correct
[OK]	IPv6 is enabled and public IPv6 address is working
[OK]	docker is running
[OK]	docker version is correct
[OK]	MySQL is running
[OK]	netplan is good
[OK]	DNS is resolving via systemd-resolved
[OK]	unbound is running
[OK]	nginx is running
[OK]	dashboard cert is valid
[OK]	dashboard is reachable via loopback
[OK]	No pending database migrations
[OK]	Service 'mysql' is running and healthy
[OK]	Service 'postgresql' is running and healthy
[OK]	Service 'mongodb' is running and healthy
[OK]	Service 'mail' is running and healthy
[OK]	Service 'graphite' is running and healthy
[OK]	Service 'sftp' is running and healthy
[OK]	box v9.1.5 is running
[OK]	Dashboard is reachable via domain name

• Output /home/yellowtent/platformdata/logs/box.log:
  2026-03-29T00:07:11.213Z apphealthmonitor: app health: 11 running / 6 stopped / 1 unresponsive

What could be the problem here?
Thanks in advance!