error 500 server prestashop 1.6

I have a problem with my site,when do I make payment with when do I make payment by bank transfer me the following errorI also changed the write permissions on the file from 644 to 755 I also did debug if you want I can send you the file

-----------------------
[PrestaShopException]

Can't load Order status
at line 174 in file classes/PaymentModule.php

168.
169. $order_status = new OrderState((int)$id_order_state, (int)$this->context->language->id);
170. if (!Validate::isLoadedObject($order_status))
171. {
172. PrestaShopLogger::addLog('PaymentModule::validateOrder - Order Status cannot be loaded', 3, null, 'Cart', (int)$id_cart, true);
173. throw new PrestaShopException('Can\'t load Order status');
174. }
175.
176. if (!$this->active)
177. {
178. PrestaShopLogger::addLog('PaymentModule::validateOrder - Module is not active', 3, null, 'Cart', (int)$id_cart, true);

•PaymentModuleCore->validateOrder - [line 64 - modules/bankwire/controllers/front/validation.php] - [9 Arguments]




•BankwireValidationModuleFrontController->postProcess - [line 171 - classes/controller/Controller.php]


•ControllerCore->run - [line 373 - classes/Dispatcher.php]


•DispatcherCore->dispatch - [line 28 - index.php]
------------------------------

can you help me?
sorry for my english
I speak little
thanks to all