MyGMC App will not connect Android phone unable to complete authorization

[T-GMCTerrain]

I cannot log in to the MyGMC app on my Android phone.  I have tried to uninstall and reinstall and that has not fixed the issue.  I can enter email and password.  I get the email notification with the second security access code, and I enter the code.  After that I get a message that says "Unable to complete authorization as there is no interactive call in progress.  This can be due to closing the app while authorization was in process"

I did not close the app, I did not leave the app, I did not tough the phone after entering the authorization code and the message above is still happening and it will not connect and it will not complete the authorization.  

[mgwyoming]

I am having the same problem today.  Is there a fix for this? I live in Wy and depend on the app in the winter to start my GMC when it is -40 out.  I had no problem until they started this extra authentication thing.  I get the same message the others are getting.  I have reloaded the app, shut off the phone, and put the code in by getting it from another device so the app doesn't think I left.  nothing same thing over and over. What is the fix? Getting mad about paying for a service I can't use

[Neda]

After bryndavis's post, I installed it again (after uninstalling it for a few months) to try their solution, it does not even open to give that error!! It crashes before opening!