Да ошибок в логе хватает. Но мне кажется, что он к работе сайта и компонента относятся, а не к 502 ошибке.
Посмотрите, пожалуйста, что критично.
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/view.html.php on line 49, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 41, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 42, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 47, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 48, referer: http://ad.art-l.com.ua/
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 51, referer: http://ad.art-l.com.ua/
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 53, referer: http://ad.art-l.com.ua/
[error] PHP Strict Standards: Non-static method JHTMLIpriceList::currSelectorHTML() should not be called statically, assuming $this from incompatible context in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 264, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 264, referer: http://ad.art-l.com.ua/
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/helpers/html.php on line 22, referer: http://ad.art-l.com.ua/
[error] PHP Strict Standards: Non-static method JHTMLIpriceList::getCurrOptions() should not be called statically, assuming $this from incompatible context in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/helpers/html.php on line 30, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 301, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 302, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 307, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 308, referer: http://ad.art-l.com.ua/
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 345, referer: http://ad.art-l.com.ua/
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/views/price/tmpl/default.php on line 568, referer: http://ad.art-l.com.ua/
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/controller.php on line 39, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/controller.php on line 48, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/controller.php on line 51, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/controller.php on line 63, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/controller.php on line 89, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/controller.php on line 94, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/administrator/components/com_ipricecalc/tables/item.php on line 95, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Creating default object from empty value in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/controller.php on line 106, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Creating default object from empty value in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/controller.php on line 121, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/controller.php on line 136, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Declaration of IpricecalcTableCurr::delete() should be compatible with that of JTable::delete() in /home/art-l/data/www/ad.art-l.com.ua/administrator/components/com_ipricecalc/tables/curr.php on line 41, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/models/price.php on line 109, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Notice: Trying to get property of non-object in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/models/price.php on line 112, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Non-static method OrderhtmlHelper::getOrderHTMLPage() should not be called statically, assuming $this from incompatible context in /home/art-l/data/www/ad.art-l.com.ua/components/com_ipricecalc/controller.php on line 162, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Non-static method OrderhtmlHelper::getOrderHTML() should not be called statically, assuming $this from incompatible context in /home/art-l/data/www/ad.art-l.com.ua/administrator/components/com_ipricecalc/helpers/orderhtml.php on line 168, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/administrator/components/com_ipricecalc/helpers/orderhtml.php on line 58, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/administrator/components/com_ipricecalc/helpers/orderhtml.php on line 60, referer: http://ad.art-l.com.ua/index.php/pricelist
[error] PHP Strict Standards: Only variables should be assigned by reference in /home/art-l/data/www/ad.art-l.com.ua/administrator/components/com_ipricecalc/helpers/orderhtml.php on line 73, referer: http://ad.art-l.com.ua/index.php/pricelist