Virtualmin behind separate NAT and second NIC connected to LAN

I am stuck with the following problem:
My first NIC is connected via a NAT/router to the internet. I’ve set the IP on this NIC to
The NAT is working perfectly, it will let the traffic through.
My second NIC is connected to my other LAN/router and the IP range on the second LAN is also 192.168.0.x and i set the IP to
What i really just want to do is have my webserver working through my first NIC and the second NIC just working as a connection to Virtualmin.
The weird thing is that it worked for a while but then stopped working. I suspect that there might be a conflict of IP addresses but i’m not sure.
I’ve searched a lot on this matter but i can’t seem to find the solution.