Ok, unless you have changed your login info (which it sounds like it is not actually denying the login...then lets try some stuff.
1. Remove the battery
from the phone and wait 20 seconds, then, with the battery still out, plug it into your wall charger, then place the battery back in and turn the phone back on. Try app again when it reloads. Do those steps in that exact order.
2. Uninstall the app from the phone and reload it, see if that fixes the issue.
If neither of those work let me know and we cna try to dig into it a little more. Sorry this thing is being a pain, I hate it when they do weird errors like this!
If it works, please click Accept as that is how I get credit. If not, let me know and we will keep working on it. Bonus NOT necessary but ALWAYS appreciated!!
PLEASE DO NOT leave Negative feedback! If you need more help PLEASE just reply to this question and I will keep working with you!