Erro ao Logar no painel

Olá,
Quando vou acessar o painel de adm.
faço o Login, quando vai entrar aparece o seguinte.

” Warning: Cannot modify header information – headers already sent by (output started at /data/multiserv/users/668612/projects/1649714/www/wp-config.php:1) in /data/multiserv/users/668612/projects/1649714/www/wp-login.php on line 353

Warning: Cannot modify header information – headers already sent by (output started at /data/multiserv/users/668612/projects/1649714/www/wp-config.php:1) in /data/multiserv/users/668612/projects/1649714/www/wp-login.php on line 365

Warning: Cannot modify header information – headers already sent by (output started at /data/multiserv/users/668612/projects/1649714/www/wp-config.php:1) in /data/multiserv/users/668612/projects/1649714/www/wp-includes/pluggable.php on line 737

Warning: Cannot modify header information – headers already sent by (output started at /data/multiserv/users/668612/projects/1649714/www/wp-config.php:1) in /data/multiserv/users/668612/projects/1649714/www/wp-includes/pluggable.php on line 738

Warning: Cannot modify header information – headers already sent by (output started at /data/multiserv/users/668612/projects/1649714/www/wp-config.php:1) in /data/multiserv/users/668612/projects/1649714/www/wp-includes/pluggable.php on line 739

Warning: Cannot modify header information – headers already sent by (output started at /data/multiserv/users/668612/projects/1649714/www/wp-config.php:1) in /data/multiserv/users/668612/projects/1649714/www/wp-includes/pluggable.php on line 934 “

espero obter ajuda,
Agradeço desde já!
🙂