The Application MIT AI2 Companion has stopped unexpectedly

Welcome Phillip

School IT departments have a difficult job protecting a class' Web safety. Sometimes they block critical things. Sharing this School IT/Network Admins: Information specific to school networks with them might help.

See these links regarding other classes that had and solved emulator issues similar to what you describe by unblocking ports and whitelisting certain url's.

Kindle Fire 8 not connecting to computer - #23 by Mitchell_Calvin

Perhaps one of other's classroom issues is discussed and solved in the above discussions. Is anything there familiar?

Share the information. You should, with the help of your IT people solve this. If not, let us know what you tried?