Custom tabs for custom custom trees: Error: No controller: form error

Questions
1

Hi ,
I am trying to add the custom tabs in a custom tree ,below is the code

    <umb-header tabs="content.tabs">
        <div class="umb-headline-editor-wrapper span12 ng-scope">
            <h1 class="ng-binding"> {{id}}</h1>
           
        </div>

Controller

$scope.content = {
    tabs: [{
        id: 1,
        label: "Templates"
    }]
};

However i am getting error on client side

Error: No controller: form
at Error (native)

<li ng-class="{'tab-error': tabHasError}" ng-repeat="tab in visibleTabs" val-tab="" class="ng-scope">

any idea on this?

Thanks

This is a companion discussion topic for the original entry at https://our.umbraco.com/forum/73866-custom-tabs-for-custom-custom-trees-error-no-controller-form-error