Problem with Unity 2020 2.1f1

When I create a new project it is opening 2 windows, one is empty and the second is ok. Then when I try to import vuforia (I have package 9.6.4) it is asking me for update, If I choose yes, it starts downloading but never finish… a couple of time it finish correctly (seems), but then a message at the status bar says that there was a problem with some dependencies, and I couldn’t make it work. I can’t import vuforia again, it tells that was already imported, neither I can use it because of that message and when I right click I don’t have vuforia option on the menu. Do you suggest other version? what should I check or what can I do to make it work properly. Thanks!

I still couldn’t fix this. When I create a new project it opens two unity windows, one with the project, the other in white.