Error when using component

[gotters]

Hi
When I add the component to the page I get the following error
No value accessor for form control with unspecified name attribute

I have added the component as follows:
<ion-tags-input
[(ngModel)]="tags"
[color]="'warn'"
[verifyMethod]="tagStrVerify">

If I add ngDefaultControl then the error goes away but the component does not show/load?
<ion-tags-input ngDefaultControl
[(ngModel)]="tags"
[color]="'warn'"
[verifyMethod]="tagStrVerify">

Please advise.
Thanks