没有为应用程序找到有效的“ap -environment”授权字符串

I am trying to configure my app to support push notification, but keep getting this error: Failed to get token, error: Error Domain=NSCocoaErrorDomain Code=3000 "no valid 'aps-environment' entitlement string found for application" UserInfo=0x1f818fc0 {NSLocalizedDescription=no valid 'aps-environment' entitlement string found for application}I am trying to configure my app to support push