[Error] 
Call to a member function getPropertyValue() on null (0)
/srv/www/monamie.kz/htdocs/local/modules/aniart.main/lib/services/productservice.php:241
#0: Aniart\Main\Services\ProductService->sortOffers(array)
	/srv/www/monamie.kz/htdocs/local/modules/aniart.main/lib/services/productservice.php:68
#1: Aniart\Main\Services\ProductService->getOffers(object)
	/srv/www/monamie.kz/htdocs/local/components/aniart/product.detail/class.php:112
#2: CAniartProductDetail->executeComponent()
	/srv/www/monamie.kz/htdocs/bitrix/modules/main/classes/general/component.php:656
#3: CBitrixComponent->includeComponent(string, array, object, boolean)
	/srv/www/monamie.kz/htdocs/bitrix/modules/main/classes/general/main.php:1041
#4: CAllMain->IncludeComponent(string, string, array, object)
	/srv/www/monamie.kz/htdocs/local/templates/shop/components/aniart/catalog/main/element.php:50
#5: include_once(string)
	/srv/www/monamie.kz/htdocs/local/templates/shop/components/aniart/catalog/main/section.php:40
#6: include(string)
	/srv/www/monamie.kz/htdocs/bitrix/modules/main/classes/general/component_template.php:789
#7: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/srv/www/monamie.kz/htdocs/bitrix/modules/main/classes/general/component_template.php:884
#8: CBitrixComponentTemplate->IncludeTemplate(array)
	/srv/www/monamie.kz/htdocs/bitrix/modules/main/classes/general/component.php:764
#9: CBitrixComponent->showComponentTemplate()
	/srv/www/monamie.kz/htdocs/bitrix/modules/main/classes/general/component.php:712
#10: CBitrixComponent->includeComponentTemplate(string)
	/srv/www/monamie.kz/htdocs/local/components/aniart/catalog/class.php:206
#11: AniartCatalogComponent->executeComponent()
	/srv/www/monamie.kz/htdocs/bitrix/modules/main/classes/general/component.php:656
#12: CBitrixComponent->includeComponent(string, array, NULL, boolean)
	/srv/www/monamie.kz/htdocs/bitrix/modules/main/classes/general/main.php:1041
#13: CAllMain->IncludeComponent(string, string, array)
	/srv/www/monamie.kz/htdocs/catalog/index.php:41
#14: include_once(string)
	/srv/www/monamie.kz/htdocs/bitrix/modules/main/include/urlrewrite.php:159
#15: include_once(string)
	/srv/www/monamie.kz/htdocs/bitrix/urlrewrite.php:2