If you experience the troubling "Endless spinner/"Loading auth" message, you just want it to end. Read on for assistance.
What it looks like
If your login looks like this
something is preventing the system from verifying your account credentials. There are several possible causes, with different solutions.
What to do
Try these ideas (in no particular order):
Check whether you have an ad blocker like Ghostery installed in your browser, and if so, tell it to trust all content on the portal.firecloud.org domain. Then reload the page.
Do a "hard refresh" of the browser window. In Chrome on a Mac, you press the
Rkeys simultaneously. This clear the cache and reload all elements of the page.
Sign out of your Google account and sign back in. Sometimes, if you use multiple Google accounts (e.g., one for work and one for personal email) some weird crossovers may interfere with authentication.
If you still experience the same issue after trying all of these solutions, let us know in the comments. Please tell us what operating system and browser you are using (including versions). If you can, use the Chrome dev tools (via the "Inspect" function in the menu that appears when you right-click on the page) and tell us whether there are any error messages reported in the console.