There is indeed something not working.
Steps to reproduce error:
1. Start empty
2. Create a certificate
3. Try to create a domain, you'll see an error
Also, when I tried to create a domain and make it create a certificate it works but then I couldn't access my domain properties.
I wonder by myself wheter core was too lazy to unpack the .exe or that they discovered too many traps in the packed .exe that they decided this would be easier. Anyway, back to the drawingboard core