could not verify mount point, check if .mntcheck exists /bin/fog.download

[alperi]

Hello,
on my fog when I try deploy an image I have this error.
version : 1.5.10
.mncheck files are present
NFS server is running
results of : showmount -e 10.20.51.150 are good

root@fogadm:~# find /images/ -name .mntcheck
/images/.mntcheck
/images/dev/.mntcheck

root@fogadm:~# systemctl status nfs-kernel-server.service 
* nfs-server.service - NFS server and services
     Loaded: loaded (/lib/systemd/system/nfs-server.service; enabled; preset: enabled)
    Drop-In: /run/systemd/generator/nfs-server.service.d
             `-order-with-mounts.conf
     Active: active (exited) since Fri 2026-01-16 10:41:43 CET; 30min ago
    Process: 315731 ExecStartPre=/usr/sbin/exportfs -r (code=exited, status=0/SUCCESS)
    Process: 315732 ExecStart=/usr/sbin/rpc.nfsd (code=exited, status=0/SUCCESS)
   Main PID: 315732 (code=exited, status=0/SUCCESS)
        CPU: 6ms
Jan 16 10:41:43 fogadm systemd[1]: Starting nfs-server.service - NFS server and services...
Jan 16 10:41:43 fogadm systemd[1]: Finished nfs-server.service - NFS server and services.

root@fogadm:~# showmount -e 10.20.51.150
Export list for 10.20.51.150:
/images/dev *
/images     *
## and same result from another computer
alperi@xub-ematt-10:~$ showmount -e 10.20.51.150
Export list for 10.20.51.150:
/images/dev *
/images     *

Fog is installed since September as a Debian Bookwrom container on Proxmox 9 and I have deployed and capture without problem.
I don’t know what happened. Any idea ?
Thanks