CBM.ERROR.00500000.REASON.IPHONEOK

Hello jesse-odonata, 

Welcome to the Community. QuickBooks is designed to be an easy-to-navigate program. It's important you're able to experience this benefit without running into issues. Rest assured, I'll be happy to help so you're on the right track. 

In order to troubleshoot this issue, I recommend uninstalling and reinstalling the app. This is a good way to troubleshoot bugs that affect the app. By reinstalling it, this ensures you're on the latest version of the mobile app. You can visit these links to reinstall the QBO mobile app:

• Android app via Google Play.
• iPhone, iPad, and Apple Watch apps are via the iTunes App Store.

Give this a try and feel free to keep me posted on how you make out. I'll be on standby.