blank page after login

[missfx]

hello,

no no it's just an example for the website, i can't write the real website because it's on developpement.

I turn on the debugger :

Warning: Cannot modify header information - headers already sent by (output started at /xxx/xxx/www/xxx/xxxxxx/plugins/i18n_base/lang/fr_FR.php:1) in /xxx/xxx/www/xxx/xxxxxx/admin/inc/cookie_functions.php on line 23

Warning: Cannot modify header information - headers already sent by (output started at /xxx/xxx/www/xxx/xxxxxx/plugins/i18n_base/lang/fr_FR.php:1) in /xxx/xxx/www/xxx/xxxxxx/admin/inc/cookie_functions.php on line 24

Warning: Cannot modify header information - headers already sent by (output started at /xxx/xxx/www/xxx/xxxxxx/plugins/i18n_base/lang/fr_FR.php:1) in /xxx/xxx/www/xxx/xxxxxx/plugins/i18n_base/backend.class.php on line 7