It is not possible to view the demo page ( http://mobile.bluedrop.me/ )

PDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'bluedrop_mobile.semaphore' doesn't exist: DELETE FROM {semaphore} WHERE (value = :db_condition_placeholder_0) ; Array ( [:db_condition_placeholder_0] => 1705516185214ebb21cc737.93950457 ) in lock_release_all() (line 269 of /home/bluedrop/public_html/includes/lock.inc).