When I log out of my App Inventor account, I go to the internet page:
https://login.appinventor.mit.edu/logout
The "Create apps" button does not work there.
In the photo above, I selected exactly which button I mean.
if so, you can click on the logo then click the "Create app" button again and your problem is resolved
Yes, I know, I just mean that this button is not working.