Fatal error: Uncaught Error: Call to undefined function _system_rebuild_theme_data() in /var/www/pool1/includes/theme.inc:798 Stack trace: #0 /var/www/pool1/includes/theme.maintenance.inc(57): list_themes() #1 /var/www/pool1/includes/bootstrap.inc(2978): _drupal_maintenance_theme() #2 /var/www/pool1/includes/errors.inc(177): drupal_maintenance_theme() #3 /var/www/pool1/includes/bootstrap.inc(2691): _drupal_log_error() #4 [internal function]: _drupal_exception_handler() #5 {main} thrown in /var/www/pool1/includes/theme.inc on line 798