Перед подключением catalog.element? т.е. в файле catalog/element.php?
У меня там так
<?if(!defined("B_PROLOG_INCLUDED") || B_PROLOG_INCLUDED!==true)die();?>
<?$ElementID = $APPLICATION->IncludeComponent(
"bitrix:catalog.element",
"",
array(
"IBLOCK_TYPE" => $arParams["IBLOCK_TYPE"],
"IBLOCK_ID" => $arParams["IBLOCK_ID"],
"PROPERTY_CODE" => $arParams["DETAIL_PROPERTY_CODE"],
"META_KEYWORDS" => $arParams["DETAIL_META_KEYWORDS"],
"META_DESCRIPTION" => $arParams["DETAIL_META_DESCRIPTION"],
"BROWSER_TITLE" => $arParams["DETAIL_BROWSER_TITLE"],
"BASKET_URL" => $arParams["BASKET_URL"],
"ACTION_VARIABLE" => $arParams["ACTION_VARIABLE"],
"PRODUCT_ID_VARIABLE" => $arParams["PRODUCT_ID_VARIABLE"],
"SECTION_ID_VARIABLE" => $arParams["SECTION_ID_VARIABLE"],
"PRODUCT_QUANTITY_VARIABLE" => $arParams["PRODUCT_QUANTITY_VARIABLE"],
"PRODUCT_PROPS_VARIABLE" => $arParams["PRODUCT_PROPS_VARIABLE"],
"CACHE_TYPE" => $arParams["CACHE_TYPE"],
"CACHE_TIME" => $arParams["CACHE_TIME"],
"CACHE_GROUPS" => $arParams["CACHE_GROUPS"],
"SET_TITLE" => 'N',
"SET_STATUS_404" => $arParams["SET_STATUS_404"],
"PRICE_CODE" => $arParams["PRICE_CODE"],
"USE_PRICE_COUNT" => $arParams["USE_PRICE_COUNT"],
"SHOW_PRICE_COUNT" => $arParams["SHOW_PRICE_COUNT"],
"PRICE_VAT_INCLUDE" => $arParams["PRICE_VAT_INCLUDE"],
"PRICE_VAT_SHOW_VALUE" => $arParams["PRICE_VAT_SHOW_VALUE"],
"USE_PRODUCT_QUANTITY" => $arParams['USE_PRODUCT_QUANTITY'],
"PRODUCT_PROPERTIES" => $arParams["PRODUCT_PROPERTIES"],
"ADD_PROPERTIES_TO_BASKET" => (isset($arParams["ADD_PROPERTIES_TO_BASKET"]) ? $arParams["ADD_PROPERTIES_TO_BASKET"] : ''),
"PARTIAL_PRODUCT_PROPERTIES" => (isset($arParams["PARTIAL_PRODUCT_PROPERTIES"]) ? $arParams["PARTIAL_PRODUCT_PROPERTIES"] : ''),
"LINK_IBLOCK_TYPE" => $arParams["LINK_IBLOCK_TYPE"],
"LINK_IBLOCK_ID" => $arParams["LINK_IBLOCK_ID"],
"LINK_PROPERTY_SID" => $arParams["LINK_PROPERTY_SID"],
"LINK_ELEMENTS_URL" => $arParams["LINK_ELEMENTS_URL"],
"OFFERS_CART_PROPERTIES" => $arParams["OFFERS_CART_PROPERTIES"],
"OFFERS_FIELD_CODE" => $arParams["DETAIL_OFFERS_FIELD_CODE"],
"OFFERS_PROPERTY_CODE" => $arParams["DETAIL_OFFERS_PROPERTY_CODE"],
"OFFERS_SORT_FIELD" => $arParams["OFFERS_SORT_FIELD"],
"OFFERS_SORT_ORDER" => $arParams["OFFERS_SORT_ORDER"],
"OFFERS_SORT_FIELD2" => $arParams["OFFERS_SORT_FIELD2"],
"OFFERS_SORT_ORDER2" => $arParams["OFFERS_SORT_ORDER2"],
"ELEMENT_ID" => $arResult["VARIABLES"]["ELEMENT_ID"],
"ELEMENT_CODE" => $arResult["VARIABLES"]["ELEMENT_CODE"],
"SECTION_ID" => $arResult["VARIABLES"]["SECTION_ID"],
"SECTION_CODE" => $arResult["VARIABLES"]["SECTION_CODE"],
"SECTION_URL" => $arResult["FOLDER"].$arResult["URL_TEMPLATES"]["section"],
"DETAIL_URL" => $arResult["FOLDER"].$arResult["URL_TEMPLATES"]["element"],
'CONVERT_CURRENCY' => $arParams['CONVERT_CURRENCY'],
'CURRENCY_ID' => $arParams['CURRENCY_ID'],
'HIDE_NOT_AVAILABLE' => $arParams["HIDE_NOT_AVAILABLE"],
'USE_ELEMENT_COUNTER' => $arParams['USE_ELEMENT_COUNTER'],
'ADD_PICT_PROP' => $arParams['ADD_PICT_PROP'],
'LABEL_PROP' => $arParams['LABEL_PROP'],
'OFFER_ADD_PICT_PROP' => $arParams['OFFER_ADD_PICT_PROP'],
'OFFER_TREE_PROPS' => $arParams['OFFER_TREE_PROPS'],
'PRODUCT_SUBSCRIPTION' => $arParams['PRODUCT_SUBSCRIPTION'],
'SHOW_DISCOUNT_PERCENT' => $arParams['SHOW_DISCOUNT_PERCENT'],
'SHOW_OLD_PRICE' => $arParams['SHOW_OLD_PRICE'],
'SHOW_MAX_QUANTITY' => $arParams['DETAIL_SHOW_MAX_QUANTITY'],
'MESS_BTN_BUY' => $arParams['MESS_BTN_BUY'],
'MESS_BTN_ADD_TO_BASKET' => $arParams['MESS_BTN_ADD_TO_BASKET'],
'MESS_BTN_SUBSCRIBE' => $arParams['MESS_BTN_SUBSCRIBE'],
'MESS_BTN_COMPARE' => $arParams['MESS_BTN_COMPARE'],
'MESS_NOT_AVAILABLE' => $arParams['MESS_NOT_AVAILABLE'],
'USE_VOTE_RATING' => $arParams['DETAIL_USE_VOTE_RATING'],
'VOTE_DISPLAY_AS_RATING' => (isset($arParams['DETAIL_VOTE_DISPLAY_AS_RATING']) ? $arParams['DETAIL_VOTE_DISPLAY_AS_RATING'] : ''),
'USE_COMMENTS' => $arParams['DETAIL_USE_COMMENTS'],
'BLOG_USE' => (isset($arParams['DETAIL_BLOG_USE']) ? $arParams['DETAIL_BLOG_USE'] : ''),
'VK_USE' => (isset($arParams['DETAIL_VK_USE']) ? $arParams['DETAIL_VK_USE'] : ''),
'VK_API_ID' => (isset($arParams['DETAIL_VK_API_ID']) ? $arParams['DETAIL_VK_API_ID'] : 'API_ID'),
'FB_USE' => (isset($arParams['DETAIL_FB_USE']) ? $arParams['DETAIL_FB_USE'] : ''),
'FB_APP_ID' => (isset($arParams['DETAIL_FB_APP_ID']) ? $arParams['DETAIL_FB_APP_ID'] : ''),
'BRAND_USE' => (isset($arParams['DETAIL_BRAND_USE']) ? $arParams['DETAIL_BRAND_USE'] : 'N'),
'BRAND_PROP_CODE' => (isset($arParams['DETAIL_BRAND_PROP_CODE']) ? $arParams['DETAIL_BRAND_PROP_CODE'] : ''),
'DISPLAY_NAME' => (isset($arParams['DETAIL_DISPLAY_NAME']) ? $arParams['DETAIL_DISPLAY_NAME'] : ''),
'ADD_DETAIL_TO_SLIDER' => (isset($arParams['DETAIL_ADD_DETAIL_TO_SLIDER']) ? $arParams['DETAIL_ADD_DETAIL_TO_SLIDER'] : ''),
'TEMPLATE_THEME' => (isset($arParams['TEMPLATE_THEME']) ? $arParams['TEMPLATE_THEME'] : ''),
),
$component
);?>