Ive been having the exact same issue started around 2 days ago and its only for my account. when i login to my alt i can see all my experiences and open them just fine. On my main I cant open or see anything except local experiences. When I relogged in to my main i was able to open games on the home page but nothing else, then I relogged again and it stopped working.
@Kullaske@freezekill123@Dapale We pushed a patch out this morning. If you restart studio and update, this issue should be resolved. Please let me know if not here or in DM