Known Issue Google Mail Login page not found
Error 337 This Webpage is not found SPDY Protocol Error
Details
Users are identifying a problem with logins to Google Mail when using an out-of-date Chrome Browser

This is happening on both Mac and Windows computers, using an old version of Chrome Browser. A simple (but consistent) work-around is to hit the refresh button TWICE.

This seems to be a Google issue, not internal to our login tool. Even if the work-around solves the problem for you, please log a help ticket with tech support (by sending an email to tech_support@concordacademy.org) so that we can narrow down the factors that generate this problem.
A more permanent fix has been to update the Chrome Browser to the current version (31.x). If simply checking for updates through the in-browser version checker does not work, please visit the direct download page for Google Chrome for Mac OS, and this installer for Windows PCs.