Thanks for joining us here in the Community, Plumberchris.
Having the QuickBooks Online mobile app comes in handy so I want to make sure you're able to use it.
Just to verify, were you able to complete the troubleshooting steps mentioned by my colleagues above to refresh the app and/or uninstall then re-install? If not please give those steps a try and let me know how things look afterward when you try to open the QuickBooks app.
I'm only a comment or post away if you have any other questions.
