UPDATE for "cannot connect to server" sign in problem on chromebooks!

One of my parents figured this out - in the app settings, you must have access to storage turned on or you get the sign in error! This is INSANE that I didn't think to try this before - so anyone who has had this issue on chromebooks, give this a try. This might be a setting that the proxy changes (just a theory) that then doesn't allow access to the sign in website.
I need to have more students test this... but this will be way better than having to remove the profile from the chromebook over and over and potentially losing the worlds students have worked on...