I'm setting up and trying to use the CsMarketplace Base module. When I try to add the vendor product to the cart I get this error:
Fatal error: Uncaught Error: Class 'Mage_Csorder_Helper_Data' not found in E:\OpenServer\domains\domikom.com.ua\app\Mage.php:547 Stack trace: #0 E:\OpenServer\domains\domikom.com.ua\app\code\local\Ced\CsMarketplace\Model\Observer.php(278): Mage::helper('csorder') #1 E:\OpenServer\domains\domikom.com.ua\app\code\core\Mage\Core\Model\App.php(1358): Ced_CsMarketplace_Model_Observer->salesQuoteItemSetVendorId(Object(Varien_Event_Observer)) #2 E:\OpenServer\domains\domikom.com.ua\app\code\core\Mage\Core\Model\App.php(1337): Mage_Core_Model_App->_callObserverMethod(Object(Ced_CsMarketplace_Model_Observer), 'salesQuoteItemS...', Object(Varien_Event_Observer)) #3 E:\OpenServer\domains\domikom.com.ua\app\Mage.php(448): Mage_Core_Model_App->dispatchEvent('sales_quote_ite...', Array) #4 E:\OpenServer\domains\domikom.com.ua\app\code\core\Mage\Sales\Model\Quote\Item.php(401): Mage::dispatchEvent('sales_quote_ite...', Array) #5 E:\OpenServer\domains\domikom.com.ua\app\code\core\Mage\Sales\Model\Quote.php(1079): Mage_Sales_Model_Quote_I in E:\OpenServer\domains\domikom.com.ua\app\Mage.php on line 547
When adding products from the main site (not vendor product), there is no error.
Tell me please, how can I solve this problem?
My configuration:
Magento 1.9.3.4
PHP-7.0
MySQL-5.7
Thank You!