Tap the app icon on your Home Screen.
Tap Cancel.
Go to Settings.
Go to General.
Go to VPN & Device Management.(On some versions: “Device Management” or “Profiles & Device Management”)
Under ENTERPRISE APP, tap the developer name.
Tap Trust [Developer Name].
Confirm again by tapping ‘Trust’ in the popup.
When you see the “Allow & Restart” prompt, tap it to continue.Your iPhone will restart to complete the setup.
Go back to the Home Screen and open the app. It should now launch normally without errors.