- fix

common/modules/triggers/views/trigger-admin/testing.php

 <?php
 use \common\components\UnisenderAPI;
+use \yii\helpers\Json;
+
 $email = 'bystrov@kupitsite.ru';
+
 $sender = new UnisenderAPI();
 // Create the send list
 $newList = $sender->createList();
-$newListObject=\yii\helpers\Json::decode($newList);
+$newListObject=Json::decode($newList);
 if (array_key_exists('result', $newListObject) && array_key_exists('id', $newListObject['result'])) {
     $newListId=$newListObject['result']['id'];
     // Subscribe user to new List