![✓ NG8001: 'mat-icon' is not a known element: Error occurs in the template of component xxComponent. - YouTube ✓ NG8001: 'mat-icon' is not a known element: Error occurs in the template of component xxComponent. - YouTube](https://i.ytimg.com/vi/BohDli1JKNc/mqdefault.jpg)
✓ NG8001: 'mat-icon' is not a known element: Error occurs in the template of component xxComponent. - YouTube
![html - Angular 10 Compile Error "error NG8001: 'mat-card-title' is not a known element: - Stack Overflow html - Angular 10 Compile Error "error NG8001: 'mat-card-title' is not a known element: - Stack Overflow](https://i.stack.imgur.com/rwURq.png)
html - Angular 10 Compile Error "error NG8001: 'mat-card-title' is not a known element: - Stack Overflow
![Conflicting components: MatFormField,MatFormField while Testing with Angular 8 · Issue #18425 · angular/components · GitHub Conflicting components: MatFormField,MatFormField while Testing with Angular 8 · Issue #18425 · angular/components · GitHub](https://user-images.githubusercontent.com/18212861/73993221-53b74900-4930-11ea-858a-5c133c3102f5.png)
Conflicting components: MatFormField,MatFormField while Testing with Angular 8 · Issue #18425 · angular/components · GitHub
![angular - NG0304: 'mat-select' is not a known element (used in the 'LoginPage' component template): - Stack Overflow angular - NG0304: 'mat-select' is not a known element (used in the 'LoginPage' component template): - Stack Overflow](https://i.stack.imgur.com/Quc53.png)