Hello @karina.harper,
I'm having the same problems as others here have mentioned. I have an older account (Personal) and after being offline for awhile, got reactivated today after I signed up for a hobbyist account (mind you, Fusion 360 still says "Active plan: Fusion 360, Personal" under Help -> About). When I try to create a new project, I get an error saying I've reached a supposed limited -- as I understand it from the link you posted earlier in the thread, there should be no limits to the number of projects I create.
You had mentioned that "the new fix here is to actually transition to a Team hub. I don't need that functionality (I don't have a team) and from the looks of it (30-day trial offer), it seems that Team hub is a paid option -- I don't want that either.
Is there a way to get my account fixed so I can create projects again?
Thanks!