Minimwatch subnet not found with VPN

[Fotospecht]

Hello,

sometimes I connect with my Mac via VPN to my NAS at home.

However I can't get Minimwatch to work on my Mac.
Even though I set the ohnet.subnet property to 192.168.1.0, Minimwatch reports that the subnet could not be found.
My local IP for the VPN adapter is 192.168.1.202 and I can also connect with the web browser to the Minimserver address http://192.168.1.100:9790.

I already disabled my Macs firewall but still no success.
Is there a way to further analyze this problem ?