[Error] 
Class 'Bitrix\Main\Composite\Helper' not found (0)
/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/classes/general/component.php:1633
#0: CBitrixComponent->getDefaultFrameMode()
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/classes/general/component_template.php:1200
#1: CBitrixComponentTemplate->getFrameMode()
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/classes/general/component_template.php:800
#2: CBitrixComponentTemplate->__IncludePHPTemplate(array, array, string)
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/classes/general/component_template.php:884
#3: CBitrixComponentTemplate->IncludeTemplate(array)
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/classes/general/component.php:764
#4: CBitrixComponent->showComponentTemplate()
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/classes/general/component.php:712
#5: CBitrixComponent->includeComponentTemplate()
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/components/bitrix/menu/component.php:386
#6: include(string)
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/classes/general/component.php:605
#7: CBitrixComponent->__includeComponent()
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/classes/general/component.php:103
#8: CBitrixComponent->executeComponent()
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/classes/general/component.php:656
#9: CBitrixComponent->includeComponent(string, array, boolean, boolean)
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/classes/general/main.php:1037
#10: CAllMain->IncludeComponent(string, string, array, boolean)
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/templates/empty/header.php:159
#11: include_once(string)
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/include/prolog_after.php:106
#12: require(string)
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/include/prolog.php:11
#13: require_once(string)
	/home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/header.php:1
#14: require(string)
	/home/edubooking/domains/fortuna-ufa.ru/public_html/index.php:5

Fatal error: Uncaught Error: Call to undefined method CJSCore::IsCoreLoaded() in /home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/lib/page/asset.php:595 Stack trace: #0 /home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/lib/page/asset.php(1729): Bitrix\Main\Page\Asset->getStrings('AFTER_CSS') #1 /home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/classes/general/main.php(723): Bitrix\Main\Page\Asset->getJs(1) #2 /home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/classes/general/main.php(3182): CAllMain->GetHeadStrings('AFTER_JS_KERNEL') #3 [internal function]: CAllMain->EndBufferContent('</title>\n\t\n\n\t<l...', 9) #4 /home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/classes/general/main.php(3415): ob_end_flush() #5 [internal function]: CAllMain::{closure}() #6 {main} thrown in /home/edubooking/domains/fortuna-ufa.ru/public_html/bitrix/modules/main/lib/page/asset.php on line 595