Hi electricmike,
Welcome to the Community. It's vital you're able to capture your receipts using QuickBooks. 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:
I recommend making sure your mobile phone settings allow for camera access so you can capture receipts using the app. Give this a try and feel free to keep me posted on how you make out. I'll be a message away.