Validation on Kendo UI for Angular DatePicker not working

I'm trying to use form validation on a Kendo UI for Angular DatePicker and it just doesn't seem to work.

I'm doing the following on all other form elements:

<div class="form-group row" [ngClass]="{ 'has-danger' : email.invalid && (email.dirty || email.touched) }">
    <input id="email" type="text" class="form-control" [(ngModel)]="member.email" name="email" #email="ngModel" required />
</div>

This works perfectly fine.

But when I try the same with the Kendo UI for Angular DatePicker I get the following error:

<div class="form-group row" [ngClass]="{ 'has-danger' : geburtsdatum.invalid && (geburtsdatum.dirty || geburtsdatum.touched) }">
    <kendo-datepicker
      id="geburtsdatum"
      [format]="'dd.MM.yyyy'"
      [(value)]="mitglied.geburtsdatum"
      #geburtsdatum="ngModel"
      required>
    </kendo-datepicker>
</div>

Now I get the error:

There is no directive with "exportAs" set to "ngModel".

I can't seem to find a way to validate Kendo UI for Angular form elements in a simple way.