Проверьте загружается ли на страницу скрипт Angular и загружаются ли скрипты, в которых прописано ваше приложение.
Вот пример кода из официальной документации, где проходит проверка при отправке формы.
<div ng-controller="ExampleController">
<form name="form" class="css-form" novalidate>
Name:
<input type="text" ng-model="user.name" name="uName" required="" />
<br />
<div ng-show="form.$submitted || form.uName.$touched">
<div ng-show="form.uName.$error.required">Tell us your name.</div>
</div>
E-mail:
<input type="email" ng-model="user.email" name="uEmail" required="" />
<br />
<div ng-show="form.$submitted || form.uEmail.$touched">
<span ng-show="form.uEmail.$error.required">Tell us your email.</span>
<span ng-show="form.uEmail.$error.email">This is not a valid email.</span>
</div>
Gender:
<input type="radio" ng-model="user.gender" value="male" />male
<input type="radio" ng-model="user.gender" value="female" />female
<br />
<input type="checkbox" ng-model="user.agree" name="userAgree" required="" />
I agree:
<input ng-show="user.agree" type="text" ng-model="user.agreeSign" required="" />
<br />
<div ng-show="form.$submitted || form.userAgree.$touched">
<div ng-show="!user.agree || !user.agreeSign">Please agree and sign.</div>
</div>
<input type="button" ng-click="reset(form)" value="Reset" />
<input type="submit" ng-click="update(user)" value="Save" />
</form>
</div>