난데없는 에러

 

'nb-menu' is not a known element:

1. If 'nb-menu' is an Angular component, then verify that it is part of this module.

2. If 'nb-menu' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.

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npm 재설치하고 우당탕탕하다보니 해결