Can not start a new project as unity has "failed to load window layout"

Quit Unity and do the following:

• Go to "AppData\Roaming\Unity\Editor-5.x\Preferences\Layouts\default" or "~/Library/Preferences/Unity/Editor-5.x/Layouts/default" for mac, delete LastLayout.dwlt and copy Default.wlt
• Paste Default.wlt into the "Library" folder of your project
• Delete CurrentLayout-default.dwlt and rename Default.wlt to CurrentLayout-default.dwlt

Reopen Unity and load the project. The editor should open normally. You should now be able to create new projects as usual too.

the simple solution if it has yet to be tried would be to uninstall unity and reinstall. if you have already tried that try updating to a newer version see if unity 2020.3 works to narrow the problem down a bit more. I had the same problem for me I just updated unity to a newer version and everything worked perfectly.