The last SDK version I was able to successfully test was 3.8.1. This one allows for lighting to bake successfully

On latest SDK 3.8.2 (And 3.8.2-beta.1):

'Generate Lighting' with unity built in lighting menu

-> Background task stuck "Waiting for shaders to compile" - The time to completion continuously rises and never moves past 5%

I am using an AMD rx 5700xt, screenshot attached is from another user who has the same issue and is using NVidia.