Something is blocking or interfering with it. Every trainer is different so don't expect them all to behave the same way, especially with security software.
I just downloaded your personalized trainer (the same exact one you downloaded) and it authenticates fine on my PC.
So why would it be working for one trainer and not another? I know your trying to help and thank you for that. I just cant find a reason why it isnt working for XCOM but it is for HOI4