Error message

• Warning: array_diff(): Expected parameter 1 to be an array, null given in FacesExtendable->extend() (line 229 of /home/members/fureigh2/sites/letterstotherevolution.com/web/sites/all/modules/rules/includes/faces.inc).
• Warning: class_implements(): Class RulesPluginFeaturesIntegrationInterface does not exist and could not be loaded in FacesExtendable->extend() (line 233 of /home/members/fureigh2/sites/letterstotherevolution.com/web/sites/all/modules/rules/includes/faces.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /usr/local/share/drupal-7.96/includes/common.inc:2861) in drupal_send_headers() (line 1551 of /usr/local/share/drupal-7.96/includes/bootstrap.inc).
• Error: Unsupported operand types in FacesExtendable->extend() (line 233 of /home/members/fureigh2/sites/letterstotherevolution.com/web/sites/all/modules/rules/includes/faces.inc).