If 'app-cabecalho' is an Angular component, then verify that it is part of this module.
If 'app-cabecalho' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message. [plugin angular-compiler]
src/app/app.component.html:0:0: 0 │ ╵ ^
Error occurs in the template of component AppComponent.
src/app/app.component.ts:7:15:
7 │ templateUrl: './app.component.html',
╵ ~~~~~~~~~~~~~~~~~~~~~~
Application bundle generation failed. [14.959 seconds] Watch mode enabled. Watching for file changes...
