I wanted to test out my game and built a standalone. At the loading screen it freezes and in not responding. I waited 30 min and nothing. I rebooted and still nothing.

From the game guru site I downloaded 2 games from the showcase. "Kshatriya_Wetwork.1" and "Redacted_-_Hired_Gun" I had the same issues with those games. Freezing and not responding at the loading screen.

My game plays perfectly from the GG editor. Any reason for this?

Everything is up to date on my machine.
My machine specs:
Intel(R) Core(TM)i9-9980XE CPU @ 3.00GHz - Memory: 128GB - Win10 - x2 NVIDIA GeForce RTX 2080 Ti - x2 Dell U-Series 38" Screen LED-Lit Monitor

Tested on another machine and the games did load. Must be some security setting on the machine where the games did not load.

Just a guess about the localization of a probable error - the other machine also has two video cards ?

No, 1 video card.

It may be a runtime issue. Try getting the .net runtimes (Visual Studio stuff). This is normally the issue when a standalone doesn't run.