I was working on one of my projects and all of a sudden, an error showed app and said my session was no longer valid. When i logged in again, every single one of my projects was gone, although I obviously didn’t delete them. What can I do now?
Which URL do you use to reach your projects?
ai2.appinventor.mit.edu
or
code.appinventor.mit.edu
?
Could you have been logged out of ai2?
Dear @lorena_y_leire,
before buying a ticket to Lourdes (forgive me for the joke 
):
Have you tried to cancel the cash memory of your browser ?
Can you use temporarily a different browser ?
Are you sure yuo're using the same account (same e-mail address) or the same IDE (as @ABG has said) ?
Have you tried to switch-off/on your PC ?
Supposing you're using the ai2.appinventor.mit.edu environment, have you tried to use this link to open App Inventor without automatically loading the last project ? https://ai2.appinventor.mit.edu/?autoload=false
If none of those works, probably @Susan_Lane might help you. ?
Best wishes.
The email address associated with the Google account you are logged into is displayed in the upper right-hand corner of App Inventor. Make sure that is the same one you used to create your projects.
Hello, I've tried using different browsers and devices. I've logged in using my laptop, pc, ipad and mobile phone and I can't see any of my projects. I'm using "https://ai2.appinventor.mit.edu/", that's where I have been working, but I don't know what happened. And yes, I am using the same account. I also tried the link you recommended (https://ai2.appinventor.mit.edu/?autoload=false), but still, my projects won't show up, it's like they just disappeared from my account.
Have you looked in "Trash" ?