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Warning: Cannot modify header information - headers already sent by (output started at /www/doc/www.focusclub.cz/www/includes/bootstrap.inc:659) in /www/doc/www.focusclub.cz/www/includes/bootstrap.inc on line 727

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Fatal error: Uncaught Error: Call to undefined function filter_xss() in /www/doc/www.focusclub.cz/www/includes/common.inc:655 Stack trace: #0 [internal function]: drupal_error_handler(2, 'Cannot modify h...', '/www/doc/www.fo...', 147, Array) #1 /www/doc/www.focusclub.cz/www/includes/common.inc(147): header('Content-Type: t...') #2 /www/doc/www.focusclub.cz/www/includes/common.inc(2667): drupal_set_header('Content-Type: t...') #3 /www/doc/www.focusclub.cz/www/includes/bootstrap.inc(1202): _drupal_bootstrap_full() #4 /www/doc/www.focusclub.cz/www/includes/bootstrap.inc(1109): _drupal_bootstrap(8) #5 /www/doc/www.focusclub.cz/www/index.php(15): drupal_bootstrap(8) #6 {main} thrown in /www/doc/www.focusclub.cz/www/includes/common.inc on line 655