I can't open projects and I downloaded Unity for the first time

I don’t know where to ask this. I just downloaded Unity and I can create new projects, but I can’t open them bc it says “this project is not valid”. The diagnose tool didn’t said anything to me and dk how to reinstall the program. I think it could be an issue from the installation bc when I were installing, at the very end said that an error happened

Hm, idk if this would help, but its worth a try:

Can you be more specific? What sorts of files are you using and where are you saving them? What version of Unity Hub and what operating system?