When Sketchup doesn't start because of a license issue

I am letting you know Colin. I was talking with Jayme in sales, explaining 2020 come up with all kinds of excuses not too launch, although when it first came up and I logged in to Trimble account it said Activated you may start using Sketchup. Now it says I have it on too many computers? I only have two and one was not even on? This is costing valuable time I still have 2017 version on which activates but will not open later files done in 2019. The main screen keeps asking for Classic License?