LMU Operation Mode: Restricted

Hello!

I recently installed LMU and DCC V4 on a new virtual machine, but I cannot activate the licenses I need. This is because LMU operation mode is restricted, but I dont understand why it is restricted.

I have opened ports 443, 389, 27000 for LMU,
I have internet connection,
LMU is v 2.2.737,
Microsoft .NET Framework 4.7.1 or later is installed,
OS is Windows Server 2016,
It is a Hyper-V machine.

As you can see from the picture LMU doesnt seem to recognise the VM. What could be the cause of this?
Any help is greatly appreciated.

All the best,

Lauri