Is the server down right now?
I am not able to load the block editor. (ai2.appinventor.mit.edu)
I tried it on Firefox and Chrome; doesn't work.
I don't think the server is down because now I can open MIT AI2.
try to check your signal using google speed test
Message on Firefox -
Message on Chrome -
I don't think its my internet problem cause all other web pages and code.appinventor.mit.edu is loading.
I think you should try to clear cookies
try on edge
Edge is not recommended for Ai2