MDBBootstrapModulesPro.forRoot()

Is added in appModule.

Using this snippet from the website:

<div class="md-form md-outline">
  <input mdbInput mdbValidate name="email" type="email" id="form8" class="form-control" [(ngModel)]="email" #input="ngModel" required pattern="[^ @]*@[^ @]*">
  <label for="form2">Email validator</label>
  <mdb-error *ngIf="input.invalid && (input.dirty || input.touched)">Input invalid</mdb-error>
  <mdb-success *ngIf="input.valid && (input.dirty || input.touched)">Input valid</mdb-success>
</div>

I get error:
1) If 'mdb-error' is an Angular component, then verify that it is part of this module.
2) If 'mdb-success' is an Angular component, then verify that it is part of this module.