MIT App Inventor's Proxy offline?

[gvictor]

I was trying to use the MIT AI2 Companion app and I received the following message:

and when I try to download the .apk file:

Does anyone have a solution to this?
Thank you for reading, hope this gets solved quickly

[Peter]

It looks to function normally for me.

[gvictor]

But why couldn't I download the .apk file?

[Peter]

Where are you working from? At home, school?

[gvictor]

From school, my classmates have also tried to use MIT AI2 Companion, unsuccessfully. It had been working until this morning, though...

[Peter]

Maybe school has blocked some ports that App Inventor needs.

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 Perhaps one of other's classroom issues is discussed and s…

[gvictor]

Update: I managed to fix the problem, its cause was my laptop's antivirus, blocking the connection to the ports used for SSDP. After disabling the firewall, the MIT AI2 Companion works normally.