I'm repeatedly running into some backup issue. It seems like my external backup (mounted via SSHFS) is getting into some trouble. Cloudron lists backups there, so the actual backup seems to be finished. But afterwards scheduled and manual backups are impossible. I always get the message that some "App task" is running and I should try again later.

I checked cloudron-support --troubleshoot but nothing of importance came up:

Vendor: Default string Product: N100M
Linux: 5.4.0-216-generic
Ubuntu: focal 20.04
Execution environment: none
none
Processor: Intel(R) N100 x 4
RAM: 32658684KB
Disk: /dev/sda2       174G
[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 v9.0.17 is running
[OK]	Dashboard is reachable via domain name
	Domain xeac.de expiry check skipped because whois is not installed. Run 'apt install whois' to check

First couple of times I restarted the server completely. Last time I just restarted the box container which did the trick.

I locked into the box logs and this might by important:

box:cron BoxError: Another backup task is in progress: 
Update task is active
    at Object.startBackupTask (/home/yellowtent/box/src/backupsites.js:379:22)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:
5)

Can you help me pinpoint the actual problem here?

Best
RoboMod