Hey there, @rdsheldon105-gma.

Thanks for taking the time to reach out to the QuickBooks Community for support. 

To clarify, are you able to log into QuickBooks Online using a web browser? If so, let's try some basic troubleshooting steps for your mobile app to clear the error. 

Here are some quick steps to fix most app-related issues:

1. Change the Wifi data connection on your device to 4G (varies by device).
2. Close and restart the app.
3. Clear app data. To do this:
   1. Open your device Settings.
   2. Click on Apps (varies by device).
   3. Choose QuickBooks app from the list, then choose Storage.
   4. Select clear data.
4. Power down and restart your device.
5. Uninstall and reinstall the app.

For additional troubleshooting steps, check out Fix common errors in the QuickBooks Mobile App. 

However, if you're unable to log into QuickBooks via browser, please let me know. In the meantime, you can follow the steps listed in Fix common sign-in errors in QuickBooks Online. 

I'll be sure to keep an eye out for your reply. Don't hesitate to let me know if you have any additional questions or concerns. Chat with you soon!