Cannot modify header information - Verursacher Plugins bereits deinstalliert

Hi Leute,

ich kann mich nicht mehr in Wordpress einloggen, und erhalte folgende Fehlern:

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-login.php on line 394

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-login.php on line 407

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 915

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 916

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 917

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 918

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 919

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 920

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 923

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 924

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 925

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 926

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 929

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 930

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 931

Warning: Cannot modify header information - headers already sent by (output started at /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-content/themes/amplechild/functions.php:3) in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/pluggable.php on line 932

Die obigen Fehler werden mir seit der Installation eines Plugins angezeigt, welches ich dann über FTP gelöscht habe.
Nun ist auch kein erneutes einloggen mehr möglich.
In der functions.php in Zeile 3 binde ich lediglich die Style Sheets aus dem Haupt Theme-Ordner ein.

Dort steht bei mir:

<?php function child_theme_styles() {

$parent_style = 'ample';

wp_enqueue_style( $parent_style, get_template_directory_uri() . '/style.css' );
wp_enqueue_style( $parent_style, get_template_directory_uri() . '/rtl.css' );
wp_enqueue_style( 'amplechild',
get_stylesheet_directory_uri() . '/style.css',
array( $parent_style ),
wp_get_theme()->get('Version')
);
}
add_action( 'wp_enqueue_scripts', 'child_theme_styles()' );?>

Weiß jemand woran der Fehler liegt?

Vielen Dank für eure Hilfe!

Ich hab das ?> am Ende entfernt, Leerzeile war auch keine drin...
Kann es sein das Wordpress irgendwie ein Problem mit dem einbinden, der verwendeten Syntax hat?

Nein, das habe ich bereits gecheckt.

Habe mal den ganzen Child-Theme Ordner vom Server genommen, dass ich mich anmeden kann. Wenn ich jetzt den Child Theme Ordner wieder hochlade,
aber die functions.php weglasse, hat er auch keine Probleme. Sobald ich dann allerdings wieder versuche das Skript einzubinden seh ich direkt auf
meiner Website folgenden Fehler:

Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'child_theme_styles()' not found or invalid function name in /homepages/42/d667832489/htdocs/clickandbuilds/FoodVise/wp-includes/class-wp-hook.php on line 298

Es scheint irgendwie die wp_enqueue_style Funktion nicht hinterlegt zu sein.

Die Klammern sind jetzt weg, bei add_action.

Mal ein Auszug aus der class-wp-hook.php:298 :

} elseif ( $the_['accepted_args'] >= $num_args ) {
$value = call_user_func_array( $the_['function'], $args );

Diesbezüglich hat mich auch google nicht weiter gebracht.