Mensaje de error

• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in drupal_environment_initialize() (line 690 of /var/www/vhosts/powershopb2b.com/tintastyle.powershopb2b.com/includes/bootstrap.inc).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in drupal_environment_initialize() (line 691 of /var/www/vhosts/powershopb2b.com/tintastyle.powershopb2b.com/includes/bootstrap.inc).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in drupal_environment_initialize() (line 692 of /var/www/vhosts/powershopb2b.com/tintastyle.powershopb2b.com/includes/bootstrap.inc).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in drupal_environment_initialize() (line 695 of /var/www/vhosts/powershopb2b.com/tintastyle.powershopb2b.com/includes/bootstrap.inc).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in drupal_environment_initialize() (line 697 of /var/www/vhosts/powershopb2b.com/tintastyle.powershopb2b.com/includes/bootstrap.inc).
• Warning: ini_set(): Headers already sent. You cannot change the session module's ini settings at this time in include_once() (line 334 of /var/www/vhosts/powershopb2b.com/tintastyle.powershopb2b.com/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 335 of /var/www/vhosts/powershopb2b.com/tintastyle.powershopb2b.com/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 343 of /var/www/vhosts/powershopb2b.com/tintastyle.powershopb2b.com/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 350 of /var/www/vhosts/powershopb2b.com/tintastyle.powershopb2b.com/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 801 of /var/www/vhosts/powershopb2b.com/tintastyle.powershopb2b.com/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 810 of /var/www/vhosts/powershopb2b.com/tintastyle.powershopb2b.com/includes/bootstrap.inc).
• Warning: session_name(): Cannot change session name when headers already sent in drupal_settings_initialize() (line 813 of /var/www/vhosts/powershopb2b.com/tintastyle.powershopb2b.com/includes/bootstrap.inc).