'md-card' is not a known element in material 2
In your src/app/modules/app-access.module.ts
import the MdCardModule
:
import { MdCardModule } from '@angular/material';
And add it in the imports:
imports: [
....
MdCardModule,
],
If you are using any other components from material 2, add those as well.
import { MatCardModule } from '@angular/material/card';
@NgModule({ ..
imports: [..
MatCardModule]