Yesterday, after the upgrade to CT v12.9.7, I couldn't log on to TBM Studio myself.
After some frustration and a following a hint from our great CSM—@Gulcin Menekse—I tried clearing the Chrome cache.
As a first measure, I tried to log on in a Chrome
incognito window and I got in properly.
If your user can access Apptio that way, then ask her to clear the cache.
I agree with @Carol St. Claire, I only resort to Edge as a very last resort when nothing else works, and then quickly scurry back to Chrome.
Such is IT's
Twilight Zone sometimes.
Good luck,
@Chuck Krussel!