I'm here to help you with your login issues, useallstarpainti.
Cache files are sometimes stored within your app. We can troubleshoot the issue by uninstalling the app and ensure that your device is updated. Then, reinstall the app. For more steps on how to troubleshooting the QuickBooks Online app, you can click here. You can also use one of our supported browsers in the meantime.
Keep me posted if you need anything else. Take care!