I noticed this debug error:
Notice: wpdb::escape is deprecated since version 3.6! Use wpdb::prepare() or esc_sql() instead. in /home/baldron/public_html/wp-includes/functions.php on line 2905
I have asked the client if it is alright to uninstall with the result of having all events inside the Events Manager removed. Since they are using this in a multisite install. There are a lot of subsites that use Events Manager.
Next step is then use your pro support.
Btw
I opened an error log we have active for the site. Among various errors that I noticed I also saw this (it seems to repeat it self):
[30-Oct-2013 17:47:12 UTC] WordPress database error Unknown column 'wp_em_events.event_rsvp_spaces' in 'field list' for query
SELECT wp_em_events.event_id,wp_em_events.post_id,wp_em_events.event_slug,wp_em_events.event_owner,wp_em_events.event_name,wp_em_events.event_start_time,wp_em_events.event_end_time,wp_em_events.event_all_day,wp_em_events.event_start_date,wp_em_events.event_end_date,wp_em_events.post_content,wp_em_events.event_rsvp,wp_em_events.event_rsvp_date,wp_em_events.event_rsvp_time,wp_em_events.event_rsvp_spaces,wp_em_events.event_spaces,wp_em_events.location_id,wp_em_events.recurrence_id,wp_em_events.event_status,wp_em_events.event_private,wp_em_events.event_date_created,wp_em_events.event_date_modified,wp_em_events.event_attributes,wp_em_events.blog_id,wp_em_events.group_id,wp_em_events.recurrence,wp_em_events.recurrence_interval,wp_em_events.recurrence_freq,wp_em_events.recurrence_days,wp_em_events.recurrence_byday,wp_em_events.recurrence_byweekno FROM wp_em_events
LEFT JOIN wp_em_locations ON wp_em_locations.location_id=wp_em_events.location_id
WHERE (<code>recurrence</code>!=1 OR <code>recurrence</code> IS NULL) AND ( event_start_date <= CAST('2013-11-07' AS DATE) AND event_end_date >= CAST('2013-09-24' AS DATE) ) AND (<code>event_status</code>=1)
ORDER BY event_name ASC, event_start_time ASC
made by require('wp-blog-header.php'), require_once('wp-includes/template-loader.php'), include('/themes/dandelion/404.php'), print_sidebar, dynamic_sidebar, call_user_func_array, WP_Widget->display_callback, EM_Widget_Calendar->widget, EM_Calendar->output, EM_Calendar->get, EM_Events->get
[30-Oct-2013 17:47:12 UTC] WordPress database error Unknown column 'wp_em_events.event_rsvp_spaces' in 'field list' for query
SELECT wp_em_events.event_id,wp_em_events.post_id,wp_em_events.event_slug,wp_em_events.event_owner,wp_em_events.event_name,wp_em_events.event_start_time,wp_em_events.event_end_time,wp_em_events.event_all_day,wp_em_events.event_start_date,wp_em_events.event_end_date,wp_em_events.post_content,wp_em_events.event_rsvp,wp_em_events.event_rsvp_date,wp_em_events.event_rsvp_time,wp_em_events.event_rsvp_spaces,wp_em_events.event_spaces,wp_em_events.location_id,wp_em_events.recurrence_id,wp_em_events.event_status,wp_em_events.event_private,wp_em_events.event_date_created,wp_em_events.event_date_modified,wp_em_events.event_attributes,wp_em_events.blog_id,wp_em_events.group_id,wp_em_events.recurrence,wp_em_events.recurrence_interval,wp_em_events.recurrence_freq,wp_em_events.recurrence_days,wp_em_events.recurrence_byday,wp_em_events.recurrence_byweekno FROM wp_em_events
LEFT JOIN wp_em_locations ON wp_em_locations.location_id=wp_em_events.location_id
WHERE (<code>recurrence</code>!=1 OR <code>recurrence</code> IS NULL) AND ( event_start_date <= CAST('2013-11-07' AS DATE) AND event_end_date >= CAST('2013-09-24' AS DATE) ) AND (<code>event_status</code>=1)
ORDER BY event_name ASC, event_start_time ASC