Error message

• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in include_once() (line 330 of /usr/www/users/philat/briefmarken-steglitz.de/sites/default/settings.php).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in include_once() (line 331 of /usr/www/users/philat/briefmarken-steglitz.de/sites/default/settings.php).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in include_once() (line 339 of /usr/www/users/philat/briefmarken-steglitz.de/sites/default/settings.php).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in include_once() (line 346 of /usr/www/users/philat/briefmarken-steglitz.de/sites/default/settings.php).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in drupal_settings_initialize() (line 819 of /usr/www/users/philat/briefmarken-steglitz.de/includes/bootstrap.inc).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in drupal_settings_initialize() (line 828 of /usr/www/users/philat/briefmarken-steglitz.de/includes/bootstrap.inc).
• Warning: session_name(): Cannot change session name when headers already sent in drupal_settings_initialize() (line 831 of /usr/www/users/philat/briefmarken-steglitz.de/includes/bootstrap.inc).
• Warning: session_set_save_handler(): Cannot change save handler when headers already sent in drupal_session_initialize() (line 242 of /usr/www/users/philat/briefmarken-steglitz.de/includes/session.inc).
• Warning: session_id(): Cannot change session id when headers already sent in drupal_session_initialize() (line 266 of /usr/www/users/philat/briefmarken-steglitz.de/includes/session.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/philat/briefmarken-steglitz.de/misc/typo3/phar-stream-wrapper/src/PharStreamWrapper.php:479) in drupal_send_headers() (line 1503 of /usr/www/users/philat/briefmarken-steglitz.de/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/philat/briefmarken-steglitz.de/misc/typo3/phar-stream-wrapper/src/PharStreamWrapper.php:479) in drupal_send_headers() (line 1503 of /usr/www/users/philat/briefmarken-steglitz.de/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/philat/briefmarken-steglitz.de/misc/typo3/phar-stream-wrapper/src/PharStreamWrapper.php:479) in drupal_send_headers() (line 1503 of /usr/www/users/philat/briefmarken-steglitz.de/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/philat/briefmarken-steglitz.de/misc/typo3/phar-stream-wrapper/src/PharStreamWrapper.php:479) in drupal_send_headers() (line 1503 of /usr/www/users/philat/briefmarken-steglitz.de/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/philat/briefmarken-steglitz.de/misc/typo3/phar-stream-wrapper/src/PharStreamWrapper.php:479) in drupal_send_headers() (line 1503 of /usr/www/users/philat/briefmarken-steglitz.de/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/philat/briefmarken-steglitz.de/misc/typo3/phar-stream-wrapper/src/PharStreamWrapper.php:479) in drupal_send_headers() (line 1503 of /usr/www/users/philat/briefmarken-steglitz.de/includes/bootstrap.inc).
• Deprecated function: implode(): Passing glue string after array is deprecated. Swap the parameters in drupal_get_feeds() (line 394 of /usr/www/users/philat/briefmarken-steglitz.de/includes/common.inc).