[Error] Class 'CProductQueryBuilder' not found (0) /home/c/cb52567/public_html/bitrix/modules/iblock/lib/component/base.php:1873 #0: Bitrix\Iblock\Component\Base->convertSelect(array) /home/c/cb52567/public_html/bitrix/modules/iblock/lib/component/base.php:1766 #1: Bitrix\Iblock\Component\Base->prepareQueryFields(array, array, array) /home/c/cb52567/public_html/bitrix/modules/iblock/lib/component/base.php:1742 #2: Bitrix\Iblock\Component\Base->prepareElementQueryFields() /home/c/cb52567/public_html/bitrix/modules/iblock/lib/component/base.php:1673 #3: Bitrix\Iblock\Component\Base->initQueryFields() /home/c/cb52567/public_html/bitrix/modules/iblock/lib/component/base.php:768 #4: Bitrix\Iblock\Component\Base->initElementList() /home/c/cb52567/public_html/bitrix/modules/iblock/lib/component/base.php:3950 #5: Bitrix\Iblock\Component\Base->processResultData() /home/c/cb52567/public_html/bitrix/modules/iblock/lib/component/element.php:286 #6: Bitrix\Iblock\Component\Element->processResultData() /home/c/cb52567/public_html/bitrix/modules/iblock/lib/component/base.php:4453 #7: Bitrix\Iblock\Component\Base->loadData() /home/c/cb52567/public_html/bitrix/modules/iblock/lib/component/base.php:4442 #8: Bitrix\Iblock\Component\Base->initialLoadAction() /home/c/cb52567/public_html/bitrix/modules/iblock/lib/component/element.php:271 #9: Bitrix\Iblock\Component\Element->initialLoadAction() #10: call_user_func(array) /home/c/cb52567/public_html/bitrix/modules/iblock/lib/component/base.php:4627 #11: Bitrix\Iblock\Component\Base->doAction() /home/c/cb52567/public_html/bitrix/modules/iblock/lib/component/base.php:4645 #12: Bitrix\Iblock\Component\Base->executeComponent() /home/c/cb52567/public_html/bitrix/modules/main/classes/general/component.php:648 #13: CBitrixComponent->includeComponent(string, array, boolean) /home/c/cb52567/public_html/bitrix/modules/main/classes/general/main.php:1039 #14: CAllMain->IncludeComponent(string, string, array, boolean) /home/c/cb52567/public_html/books/item.php:148 #15: include_once(string) /home/c/cb52567/public_html/bitrix/modules/main/include/urlrewrite.php:159 #16: include_once(string) /home/c/cb52567/public_html/bitrix/urlrewrite.php:2