I have problems with my installed Postman on a Windows Server 2012 R2 (x64 Version 6.3, build 9600).
First of all, I have downloaded and successfully installed (and also later removed) different versions of Postman: 6.1.4 (tried x86 and x64) and 6.1.3 (tried x86 and x64)
Fact:
I access my Windows Server 2012 R2 instance through a nested RDP like this
My computer -> Server 1 -> Windows Server 2012 R2
Edit 1:
Image depicting how I access my Windows Server 2012 R2.
Same result with every tried Postman-version. Whats the problem here?
I do not know about any other application on the server that have this GUI problem.
Best Answer
I had this same issue, and I solved it by setting the POSTMAN_DISABLE_GPU environment variable, as described here: https://github.com/postmanlabs/postman-app-support/issues/4594.
Note that my scenario is a little different: I'm running Server 2012 in VMWare Fusion 10.0 on a Mac OS High Sierra. But my experience was identical to yours.