亚马逊独立站无法搜索，官方demo亦然

亚马逊独立站无法搜索，和官方demo一样出现这个问题。可以确认不是配置问题。

复现步骤

• 下载安装amazon应用
• 激活应用，搜索出现异常
• 关闭应用，搜索正常

报错文件 in addons/fecmall/fecamazon/app/appfront/modules/Catalogsearch/block/index/Index.php at line 57

报错代码

$products = $productCollInfo['coll'];
        $this->_productCount = $productCollInfo['count'];
        //echo $this->_productCount;
        return [
            'searchText'        => $this->_searchText,
            'title'             => $this->_title,
            'name'              => Yii::$service->store->getStoreAttrVal($this->_category['name'], 'name'),
            'image'             => $this->_category['image'] ? Yii::$service->category->image->getUrl($this->_category['image']) : '',
            'description'       => Yii::$service->store->getStoreAttrVal($this->_category['description'], 'description'),
            'products'          => $products,
            'count'         => $productCollInfo['count'],
            'query_item'        => $this->getQueryItem(),
            'product_page'      => $this->getProductPage(),