After replacing the site from Bitrix to Wordpress, it is impossible to create similar links?

Question

1C-Bitrix

Who can suggest what to do? In general, I decided to abandon Bitrix and redesigned the site to wp, so as not to lose SEO positions, I decided to make similar links that were before. The old site has been completely removed from the directory, htaccess is normal, where to dig, what to do? Help plz
Warning: require(/var/www/domains/kazan.kedrdoma.ru/bitrix/header.php): failed to open stream: No such file or directory in /var/www/domains/kazan.kedrdoma.ru/ price/kleeniy-brus/index.php on line 2

Fatal error: require(): Failed opening required '/var/www/domains/kazan.kedrdoma.ru/bitrix/header.php' (include_path='.:/usr /local/zend/var/libraries/Zend_Framework_1/default/library:/usr/local/zend/share/pear') in /var/www/domains/kazan.kedrdoma.ru/price/kleeniy-brus/index.php online 2