There is this problem, where you open SketchUp 2019 or 2020, and immediately you see a message about SketchUo cannot launch because of a license error.
Every release of SketchUp we added something to help with that problem. 2020 in particular fixed the issue for about 2/3rd of the cases we knew of.
But, it didn’t fix it for everyone. After quite a lot of testing, we did track down what the issue was:
One of the software libraries we use does a check in with Windows, about machine details. In an update to those libraries they accessed something in particular, and that’s when things broke. Sadly, the new thing that was queried was something we don’t even need.
We are going to adjust SketchUp to cope with the times when Windows fails to respond to the times when that code queries them. If Windows fails, and the third party libraries report something bad to SketchUp, we will ignore it.
That change exists internally already, but I have had some trouble tracking down people to test the workaround.
If you are able to open 2019 or 2020, and see a cannot launch because of a license error, please let me know, I may have a fix for that.