Fehler Gafiksammlung

[Zetsu]

Ich bekomm folgende Fehlermeldung wen ich im ACP die Grafiksammlung ändern will.

Fehlermeldung

[phpBB Debug] PHP Notice: in file /includes/acp/acp_styles.php on line 1517: strtoupper() expects parameter 1 to be string, array given
[phpBB Debug] PHP Notice: in file /adm/index.php on line 150: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3706)
[phpBB Debug] PHP Notice: in file /adm/index.php on line 152: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3706)
[phpBB Debug] PHP Notice: in file /adm/index.php on line 153: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3706)
[phpBB Debug] PHP Notice: in file /adm/index.php on line 154: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3706)

/includes/acp/acp_styles.php Zeile 1517

'TEXT' => (($category == 'custom') ? $img : $user->lang['IMG_' . strtoupper($img)])

/adm/index.php Zeile 150-154

header('Content-type: text/html; charset=UTF-8');

header('Cache-Control: private, no-cache="set-cookie"');
header('Expires: 0');
header('Pragma: no-cache');

/includes/functions.php Zeile 3706

echo '<b>[phpBB Debug] PHP Notice</b>: in file <b>' . $errfile . '</b> on line <b>' . $errline . '</b>: <b>' . $msg_text . '</b><br />' . "\n";

Könnt ihr mir sagen wo der Fehler liegt.

[Zetsu]

Kann den keiner helfen.