Error: [ng:areq] Argument controller is not a function, got undefined?

Question

Angular

Good afternoon, angular throws an error Error: [ng:areq] Argument 'usersCtrl' is not a function, got undefined .
I can’t understand why he swears, for the test I wrote the simplest interaction and everything seems to work, but no. The project also has controllers and they work fine, the problem is creating new screenshots of code pieces.:

<script src="scripts/controllers/pageUserCtrl.js" type="text/javascript"></script>

controller

app.js

user.html
error

Answer 1

//app.js
angular.module('prApp', [])
    .controller('usersCtrl',['$scope' , function ($scope) {
        $scope.message = 'Page test';
    }
]);
//users2Ctrl.js
angular.module('prApp')
    .controller('users2Ctrl', UsersCtrl)
    
UsersCtrl.$inject = ['$scope'];

function UsersCtrl ($scope) {
  $scope.message = 'User2Ctrl';
}

or

//app.js
angular.module('prApp', [
  '..',
  'userCtrl'
]);

//userCtrl.js
angular.module('userCtrl', [])
.controller('userCtrl',...

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