ERROR Error: Uncaught (in promise): Error: StaticInjectorError

질문: ERROR Error: Uncaught (in promise): Error: StaticInjectorError[CallNumber]: StaticInjectorError[CallNumber]:      NullInjectorError: No provider for CallNumber! Error: StaticInjectorError[CallNumber]:    StaticInject...

ionic 문제 해결 방법