Seit heute erscheinen mitmal einige Fehler wenn ich meine Seite aufrufe, jemand eine Idee ob da noch was zu retten ist?

Warning: include(./include/config_default.inc.php): failed to open stream: No such file or directory in /home/www/galerie/include/common.inc.php on line 86

Warning: include(./include/config_default.inc.php): failed to open stream: No such file or directory in /home/www/galerie/include/common.inc.php on line 86

Warning: include(): Failed opening './include/config_default.inc.php' for inclusion (include_path='.:/usr/share/php') in /home/www/galerie/include/common.inc.php on line 86

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /home/www/galerie/include/common.inc.php:86) in /home/www/galerie/include/common.inc.php on line 149

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/www/galerie/include/common.inc.php:86) in /home/www/galerie/include/common.inc.php on line 149

Warning: Invalid argument supplied for foreach() in /home/www/galerie/include/functions_user.inc.php on line 338


Warning:  [mysql error 1064] You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FROM galerie_users
  WHERE  = ''' at line 2

SELECT
  FROM galerie_users
  WHERE  = '' in /home/www/galerie/include/dblayer/functions_mysqli.inc.php on line 832


Fatal error: Call to a member function fetch_assoc() on a non-object in /home/www/galerie/include/dblayer/functions_mysqli.inc.php on line 213