[Error] 
Call to a member function isAuthorized() on null (0)
/home/bitrix/www/bitrix/modules/sale/lib/orderbase.php:1640
#0: Bitrix\Sale\OrderBase->onFieldModify(string, string, string)
	/home/bitrix/www/bitrix/modules/sale/lib/order.php:1076
#1: Bitrix\Sale\Order->onFieldModify(string, string, string)
	/home/bitrix/www/bitrix/modules/sale/lib/internals/entity.php:279
#2: Bitrix\Sale\Internals\Entity->setField(string, string)
	/home/bitrix/www/bitrix/modules/sale/lib/orderbase.php:483
#3: Bitrix\Sale\OrderBase->setField(string, string)
	/home/bitrix/www/bitrix/modules/sale/lib/order.php:513
#4: Bitrix\Sale\Order->onShipmentCollectionModify(string, object, string, string, string)
	/home/bitrix/www/bitrix/modules/sale/lib/shipmentcollection.php:207
#5: Bitrix\Sale\ShipmentCollection->onItemModify(object, string, string, string)
	/home/bitrix/www/bitrix/modules/sale/lib/internals/collectableentity.php:32
#6: Bitrix\Sale\Internals\CollectableEntity->onFieldModify(string, string, string)
	/home/bitrix/www/bitrix/modules/sale/lib/shipment.php:2013
#7: Bitrix\Sale\Shipment->onFieldModify(string, string, string)
	/home/bitrix/www/bitrix/modules/sale/lib/internals/entity.php:279
#8: Bitrix\Sale\Internals\Entity->setField(string, string)
	/home/bitrix/www/bitrix/modules/sale/lib/shipment.php:819
#9: Bitrix\Sale\Shipment->setField(string, string)
	/home/bitrix/www/bitrix/modules/sale/lib/shipmentitemcollection.php:693
#10: Bitrix\Sale\ShipmentItemCollection::load(object)
	/home/bitrix/www/bitrix/modules/sale/lib/shipment.php:1383
#11: Bitrix\Sale\Shipment->getShipmentItemCollection()
	/home/bitrix/www/bitrix/modules/sale/lib/shipment.php:2366
#12: Bitrix\Sale\Shipment->verify()
	/home/bitrix/www/bitrix/modules/sale/lib/shipmentcollection.php:1409
#13: Bitrix\Sale\ShipmentCollection->verify()
	/home/bitrix/www/bitrix/modules/sale/lib/order.php:1973
#14: Bitrix\Sale\Order->verify()
	/home/bitrix/www/bitrix/modules/sale/lib/orderbase.php:1072
#15: Bitrix\Sale\OrderBase->save()
	/home/bitrix/www/bitrix/modules/sale/lib/order.php:2341
#16: Bitrix\Sale\Order->save()
	/home/bitrix/www/local/php_interface/init.php:1699
#17: Cancel_Order(integer)
	/home/bitrix/www/bitrix/modules/main/classes/mysql/agent.php(162) : eval()'d code:1
#18: eval
	/home/bitrix/www/bitrix/modules/main/classes/mysql/agent.php:162
#19: CAgent::ExecuteAgents(string)
	/home/bitrix/www/bitrix/modules/main/classes/mysql/agent.php:40
#20: CAgent::CheckAgents()
	/home/bitrix/www/bitrix/modules/main/include.php:271
#21: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog_before.php:14
#22: require_once(string)
	/home/bitrix/www/bitrix/modules/main/include/prolog.php:10
#23: require_once(string)
	/home/bitrix/www/bitrix/header.php:1
#24: require(string)
	/home/bitrix/www/izdatelstvo/avtory/index.php:2
#25: include_once(string)
	/home/bitrix/www/bitrix/modules/main/include/urlrewrite.php:159
#26: include_once(string)
	/home/bitrix/www/bitrix/urlrewrite.php:2