Оформление заказа

[Error] 
Call to a member function calculate() on null (0)
/home/n/nnosatx1/golden-decor.ru/public_html/local/components/custom/order/templates/.default/sidebar.php:21
#0: require
	/home/n/nnosatx1/golden-decor.ru/public_html/local/components/custom/order/templates/.default/template.php:27
#1: include(string)
	/home/n/nnosatx1/golden-decor.ru/public_html/bitrix/modules/main/classes/general/component_template.php:725
#2: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/home/n/nnosatx1/golden-decor.ru/public_html/bitrix/modules/main/classes/general/component_template.php:820
#3: CBitrixComponentTemplate->IncludeTemplate(array)
	/home/n/nnosatx1/golden-decor.ru/public_html/bitrix/modules/main/classes/general/component.php:745
#4: CBitrixComponent->showComponentTemplate()
	/home/n/nnosatx1/golden-decor.ru/public_html/bitrix/modules/main/classes/general/component.php:693
#5: CBitrixComponent->includeComponentTemplate()
	/home/n/nnosatx1/golden-decor.ru/public_html/local/components/custom/order/component.php:42
#6: include(string)
	/home/n/nnosatx1/golden-decor.ru/public_html/bitrix/modules/main/classes/general/component.php:604
#7: CBitrixComponent->__includeComponent()
	/home/n/nnosatx1/golden-decor.ru/public_html/bitrix/modules/main/classes/general/component.php:663
#8: CBitrixComponent->includeComponent(string, array, NULL)
	/home/n/nnosatx1/golden-decor.ru/public_html/bitrix/modules/main/classes/general/main.php:1039
#9: CAllMain->IncludeComponent(string, string, array)
	/home/n/nnosatx1/golden-decor.ru/public_html/cabinet/order/index.php:8