Problems using a samba mounted volume as /backups

[EA5KL]

Hello to all!!

I'm trying everything i could think to make the backup option to work.
But everytime the answer is the same error: No volume is mounted at /backups in the Arcane container. Backups will only live inside Docker unless you mount a host path.

This is my compose file:
services:
arcane:
image: ghcr.io/getarcaneapp/arcane:latest
container_name: arcane
ports:
- "3552:3552"
volumes:
- /var/run/docker.sock:/var/run/docker.sock
- /mnt/backups:/backups
- arcane-data:/app/data
- projects:/app/data/projects
environment:
- APP_URL=http://localhost:3552
- PUID=1000
- PGID=1000
- ENCRYPTION_KEY=*****
- JWT_SECRET=*****
- DOCKER_API_VERSION=1.41
restart: unless-stopped

volumes:
arcane-data:
projects:

I don't know how to do it, any help will be wellcome.

Thanks in advance, and forget my english.