Just for test, I have installed Radeon Pro Render add-on in Blender 2.79b.
My Blender version is the default downloaded version. No more add-ons and preferences changes.
Starting Blender, using the default Pro Render parameters and the Blender basic cube mesh I have previewed my scene using SHIFT+Z.
First time everything ok, second SHIFT+Z -> Blender crashed and disappear immediate.
Any suggestion to execute my render ?
Any parameters to change ?