Erro PHP failed to open stream

Pessoal, boa noite.

Ontem fiz a migração do meu site (hostinger -> hostgator). Quando entro nele aparece a seguinte mensagem:

Warning: require(/home/ilove670/public_html/lucianoleao.com/wp-blog-header.php): failed to open stream: No such file or directory in /home/ilove670/public_html/lucianoleao.com/index.php on line 17

Fatal error: require(): Failed opening required ‘/home/ilove670/public_html/lucianoleao.com/wp-blog-header.php’ (include_path=’.:/opt/php54/lib/php’) in /home/ilove670/public_html/lucianoleao.com/index.php on line 17

Como eu posso solucionar esse problema?

Linha 17

require( dirname( __FILE__ ) . '/wp-blog-header.php' );