Cannot mount an NFS shared folder while TailScale is up on the client

[mehran]

I have installed TailScale as an app on my TrueNAS Scale (TrueNAS-SCALE-22.12.3). I also have a folder shared through NFS which I can mount into a local path on my laptop like this:

❯ sudo mount 192.168.1.250:/mnt/pool1/desktop /mnt/desktop

But when I turn on the TailScale on my laptop, the above command fails with this error message:

mount.nfs: Operation not permitted for 192.168.1.250:/mnt/pool1/desktop on /mnt/desktop

This is while I'm in the same network (physically) as before and I can still SSH into the same server. The only service that fails is NFS.

Does anyone know what the problem is?