The problem may occur in the iOS version of the SportsNow app.
The «Add to calendar» function opens the iOS operating system's event window for creating an appointment. So make sure you did the following points:
- The SportsNow app has permission to access your calendar:
- Press «SportsNow» - «Calendar» in the iOS settings app.
- Make sure that the switch is set to ON i.e. green.
- At least one account with a calendar is set up in the iOS Preferences App under «Passwords & Accounts».
- You have restarted the device.