fix

common/modules/content/models/CoContent.php

@@ -139,11 +139,6 @@ class CoContent extends \common\components\ActiveRecordModel
         return $this->hasMany(CoContentLang::className(), ['content_id' => 'id']);
     }
 
-    public function beforeSave($insert) {
-        $this->text = str_replace("../../../source/","/source/",$this->text);
-        return parent::beforeSave($insert);
-    }
-
     private function getPath()
     {
         return Yii::getAlias('@frontend/web') . self::PHOTO_FOLDER;

common/modules/content/models/CoContentLang.php

@@ -77,6 +77,12 @@ class CoContentLang extends \common\components\ActiveRecordModel
         ];
     }
 
+    public function beforeSave($insert) 
+    {
+        $this->text = str_replace("../../../source/","/source/",$this->text);
+        return parent::beforeSave($insert);
+    }
+
     /**
      * @return \yii\db\ActiveQuery
      */