Hello MaineWorker,
If an app on your iPhone or iPad doesn't work as expected, you can try to resolve the issue by completing the steps here: If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open - Apple Support
You may find these steps helpful:
1. Close and reopen the app
2. Restart your device
3. Check for updates
4. Delete the app, then redownload it
You can see more detail about those steps in the article we mentioned above.
If those steps don't resolve the issue we recommend reaching out to Official Apple Support
Thanks.