Myślisz, że jak podasz numer błędu to ktoś tutaj zgadnie co się pod nim kryje ?
Wklej tutaj zawartość pliku z var/report/ o takim numerze.
a:5:{i:0;s:33:"String could not be parsed as XML";i:1;s:2047:"#0 /home/naszaera/public_html/magento/app/code/community/Sto/Platnoscipl/Model/Platnoscipl.php(66): SimpleXMLElement->__construct('<html><head><ti...')
#1 /home/naszaera/public_html/magento/app/code/community/Sto/Platnoscipl/Model/Platnoscipl.php(106): Sto_Platnoscipl_Model_Platnoscipl->_xml('<html><head><ti...')
#2 /home/naszaera/public_html/magento/app/code/community/Sto/Platnoscipl/Model/Source/PaymentTypes.php(30): Sto_Platnoscipl_Model_Platnoscipl->getEnabledPaymentTypes()
#3 /home/naszaera/public_html/magento/app/code/core/Mage/Adminhtml/Block/System/Config/Form.php(385): Sto_Platnoscipl_Model_Source_PaymentTypes->toOptionArray(true)
#4 /home/naszaera/public_html/magento/app/code/core/Mage/Adminhtml/Block/System/Config/Form.php(204): Mage_Adminhtml_Block_System_Config_Form->initFields(Object(Varien_Data_Form_Element_Fieldset), Object(Mage_Core_Model_Config_Element), Object(Mage_Core_Model_Config_Element))
#5 /home/naszaera/public_html/magento/app/code/core/Mage/Adminhtml/Block/System/Config/Edit.php(92): Mage_Adminhtml_Block_System_Config_Form->initForm()
#6 /home/naszaera/public_html/magento/app/code/core/Mage/Adminhtml/controllers/System/ConfigController.php(77): Mage_Adminhtml_Block_System_Config_Edit->initForm()
#7 /home/naszaera/public_html/magento/app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Adminhtml_System_ConfigController->editAction()
#8 /home/naszaera/public_html/magento/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(253): Mage_Core_Controller_Varien_Action->dispatch('edit')
#9 /home/naszaera/public_html/magento/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#10 /home/naszaera/public_html/magento/app/code/core/Mage/Core/Model/App.php(304): Mage_Core_Controller_Varien_Front->dispatch()
#11 /home/naszaera/public_html/magento/app/Mage.php(596): Mage_Core_Model_App->run(Array)
#12 /home/naszaera/public_html/magento/index.php(80): Mage::run('', 'store')
#13 {main}";s:3:"url";s:89:"/index.php/admin/system_config/edit/section/payment/key/da231531d667fec360ce6eec15056c19/";s:11:"script_name";s:10:"/index.php";s:4:"skin";s:5:"admin";}
cons STATE_WASZ_CUSTOM_STATUS = 'wasz_custom_status';
$order->setState(Mage_Sales_Model_Order::STATE_WASZ_CUSTOM_STATUS, TRUE);