- Проверяем верстку

common/modules/school/views/course/index.php

@@ -95,6 +95,8 @@ WidgetAssetBundle::register($this);
 </section>
 
 <div class="white-popup-block mfp-hide">
+    <?= RegistrationWidget::widget(); ?>
+    <?= LoginWidget::widget(); ?>
 </div>
 
 <?php if (Yii::$app->user->isGuest):?>

common/modules/users/widgets/LoginWidget.php

@@ -8,6 +8,12 @@ class LoginWidget extends Widget
 {
     public $modelLogin;
     public $formLoginPopup;
+
+    public function init()
+    {
+        parent::init();
+    }
+
     /**
 	 * Executes the widget.
 	 * This method is called by {@link CBaseController::endWidget}.

common/modules/users/widgets/RegistrationWidget.php

@@ -8,6 +8,12 @@ class RegistrationWidget extends Widget
 {
     public $modelUser;
     public $formPopup;
+
+    public function init()
+    {
+        parent::init();
+    }
+
     /**
 	 * Executes the widget.
 	 * This method is called by {@link CBaseController::endWidget}.

frontend/views/layouts/main.php

@@ -31,7 +31,7 @@ AppAsset::register($this);
 
     <?php echo $content ?>
 
-    <?php //echo \Yii::$app->controller->renderPartial('//layouts/foot')?>
+    <?php echo \Yii::$app->controller->renderPartial('//layouts/foot')?>
 
     <?php $this->endBody() ?>