Connection error when they have internet

This is what I have:

We can’t seem to connect to your project at the moment, apologies. Please try refreshing your browser. If that doesn’t work, contact support and they’ll be able to help you out.

Uh oh, we can’t connect to Glitch, which means your changes aren’t being saved. To keep your changes, copy them to your clipboard, reload, and paste them back in.

This happens when I have internet, and this always happen.