Cannot modify header information

Hola,

He instalado WordPress desde el panel de control del servidor pero al intentar hacer el login, me sale el mensaje siguiente:

Warning: Cannot modify header information – headers already sent by (output started at /usr/home/canterasacha.com/web/blog/wp-config.php:1) in /usr/home/canterasacha.com/web/blog/wp-login.php on line 368

Warning: Cannot modify header information – headers already sent by (output started at /usr/home/canterasacha.com/web/blog/wp-config.php:1) in /usr/home/canterasacha.com/web/blog/wp-login.php on line 380

Warning: Cannot modify header information – headers already sent by (output started at /usr/home/canterasacha.com/web/blog/wp-config.php:1) in /usr/home/canterasacha.com/web/blog/wp-includes/pluggable.php on line 680

Warning: Cannot modify header information – headers already sent by (output started at /usr/home/canterasacha.com/web/blog/wp-config.php:1) in /usr/home/canterasacha.com/web/blog/wp-includes/pluggable.php on line 681

Warning: Cannot modify header information – headers already sent by (output started at /usr/home/canterasacha.com/web/blog/wp-config.php:1) in /usr/home/canterasacha.com/web/blog/wp-includes/pluggable.php on line 682

Warning: Cannot modify header information – headers already sent by (output started at /usr/home/canterasacha.com/web/blog/wp-config.php:1) in /usr/home/canterasacha.com/web/blog/wp-includes/pluggable.php on line 876

Hace referencia a una carpeta que no existe (canterasacha.com/web/blog/) ya que solo existe esta canterasacha.com/blog/ y wordpress está instalado en ella.

Muchas gracias por la ayuda!