Community attendees view broken after beta8

Something is up with the community attendees content pane view 'cod_community_attendees'. No results are shown and there is an error in the views preview area when editing the view.

SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ESCAPE '\\') )))) subquery' at line 4

Also on a fresh COD install, when editing the view I see these other messages.

This view has been automatically updated to fix missing relationships. While this View should continue to work, you should verify that the automatic updates are correct and save this view.

Warning: htmlspecialchars() expects parameter 1 to be string, array given in check_plain() (line 1583 of /var/www/cod.vm/includes/bootstrap.inc).

This is the query from views preview:

SELECT ticket_registration.trid AS trid, users_ticket_registration.picture AS users_ticket_registration_picture, users_ticket_registration.uid AS users_ticket_registration_uid, users_ticket_registration.name AS users_ticket_registration_name, users_ticket_registration.mail AS users_ticket_registration_mail, ticket_registration. AS ticket_registration_, '' AS field_data_field_profile_first__entity_type, '' AS field_data_field_profile_last__entity_type, '' AS field_data_field_profile_job_title__entity_type, '' AS field_data_field_profile_org__entity_type
FROM 
{ticket_registration} ticket_registration
INNER JOIN {users} users_ticket_registration ON ticket_registration.user_uid = users_ticket_registration.uid
INNER JOIN {ticket_type} ticket_type_ticket_registration ON ticket_registration.bundle = ticket_type_ticket_registration.ttid
WHERE (( (ticket_type_ticket_registration.entity_id = '1' ) )AND(( (ticket_registration.state LIKE 'checked_in', 'completed' ESCAPE '\\') )))
LIMIT 50 OFFSET 0