Hello amish133,
Thank you for reaching out to Apple Support Communities.
If this is only happening with one app, then these steps should help:
"If an app on your iPhone or iPad doesn't work as expected, try this.
Close and reopen the app
Force the app to close. Then open the app to see if it works as expected.
Restart your device
Restart your iPhone or restart your iPad. Then open the app to see if it works as expected.
Check for updates
To see if updates are available for the app, open the App Store, tap your profile icon, then scroll down to see if updates are available. If updates aren't available for the app, update the software on your iPhone or iPad.
Delete the app, then redownload it
Delete the app. When you do this, you might lose data that was stored in the app. Then redownload the app. Then check to see if the problem with the app is fixed."
Additional details can be found here: If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open
If the issue persists, I may be best to reach out to the developer directly: How to contact an app developer
Cheers!
