Why there is every week happen that no available server around 11am-1pm.
Same here 
I’m new to this, do you know if our progress comes back once it’s fixed?
Yes, it comes back. It has been like this for the last days. Deadline is today, the server must be loaded. But this is very concerning. Clock is ticking.
Try the code server, or even the ai2 test server
I did. No success.
Same problem, all servers?
Yes.
Code server just tested, up and running ok
This usually happens due to server load during peak hours (especially around deadlines).
You can try:
- ai2-test server: https://ai2-test.appinventor.mit.edu
- code server: https://code.appinventor.mit.edu
Both of these are working fine for me right now.
Also, your work is saved automatically on the server, so once it’s back up you should be able to continue where you left off.
If this keeps happening every week around the same time, it might be worth reporting it as a reliability issue.
you can open the browser DevTools (F12 → Network tab) and reload the page — check if any requests are failing (like 503 or timeout). That usually confirms it's a server-side load issue.
I did. It’s a server problem. I put the screen on the other topic.
But thanks for the help anyway.
In the screen you posted the address bar contains: ai2a.appinventor.mit.edu.
Are you saying that if you type: https://code.appinventor.mit.edu/ you are redirected to ai2a.appinventor.mit?
P.S.
Try also “normal workarounds”: logout/login, clear browser data, change browser…
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