Fixed duplicate error message when client validation is enabled

extensions/bootstrap/ActiveField.php

@@ -332,7 +332,7 @@ class ActiveField extends \yii\widgets\ActiveField
             ],
             'errorOptions' => [
                 'tag' => 'p',
-                'class' => 'help-block',
+                'class' => 'help-block help-block-error',
             ],
             'inputOptions' => [
                 'class' => 'form-control',

extensions/bootstrap/CHANGELOG.md

@@ -5,6 +5,7 @@ Yii Framework 2 bootstrap extension Change Log
 --------------------------
 
 - Bug #3292: Fixed dropdown widgets rendering incorrect HTML (it3rmit)
+- Bug #3740: Fixed duplicate error message when client validation is enabled (tadaszelvys)
 - Bug #3749: Fixed invalid plugin registration and ensure clickable links in dropdown (kartik-v)
 - Chg #3036: Upgraded Twitter Bootstrap to 3.1.x (qiangxue)