Hello there, capitalcaraudio.
If you're getting an error "Please choose a template before saving," we have this issue reported to our engineers. They're already working on getting this fix as soon as possible.
As a workaround, you'll want to use the web browser, or the browser on your phone to create the expense.
Otherwise, we can do some troubleshooting steps on your mobile app. Here's an article for the steps: Mobile Troubleshooting Quick-Start Guide.
I'll be around if you need anything else. Thanks.