To resolve the issue of the Red Rover K12 app not working on any employees' iPhones in your building, follow these steps systematically:

1. Test Internet Connection: Ensure that all devices are connected to a stable Wi-Fi or cellular network. A weak or unstable connection may hinder app functionality.

2. Check for App Updates: Go to the App Store on each iPhone and check if there is an available update for the Red Rover app. Updating the app can often resolve bugs and compatibility issues. To do this, open the App Store, tap on your profile picture, scroll down to see pending updates, and update Red Rover if needed.

3. Force Close the App:
- On iPhones with Face ID, swipe up from the bottom and pause in the middle of the screen.
- On iPhones with a Home button, double-click the Home button.
- Find the Red Rover app and swipe it up to close. Then try reopening the app.

4. Restart Devices: Restart each iPhone. This can help clear temporary glitches affecting the app.

5. Uninstall and Reinstall the App: If the problem persists, uninstall the Red Rover app:
- Press and hold the app icon on the home screen until options appear.
- Tap "Remove App," then "Delete App" to uninstall it. Once uninstalled, reinstall it from the App Store.

6. Check iOS Version: Verify that the iPhones are running a compatible version of iOS. Most apps function optimally on recent versions of iOS. If necessary, update the iOS by going to Settings > General > Software Update.

7. Contact Support: If none of these steps resolve the issue, contact Red Rover's support team by emailing [email protected] to report the problem and get further assistance. Document the issues you've encountered for a more comprehensive support experience - learn more.

8. Check for Known Issues: It could be beneficial to look into community discussions for any widespread issues. For example, there have been reports by users experiencing app bugs following updates to iOS 17. This might help in understanding if the problem is being experienced by others as well - learn more.

By following these steps, you should be able to troubleshoot and potentially resolve the issues preventing the Red Rover K12 app from functioning correctly on your employees' iPhones.