Open the app and tap Verify . It will prompt you to install a configuration profile. Follow the prompts in Settings to complete the verification. Option 2: Jailbroken Method
This method uses Enterprise Certificates, which are occasionally revoked by Apple. Open the app and tap Verify
Go to > General > VPN & Device Management (or Profiles & Device Management ). Open the app and tap Verify
Find the profile associated with AppCake under . Tap Trust and confirm. Open the app and tap Verify