Error message

User warning: The following module is missing from the file system: lightbox2. For information about how to fix this, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1143 of /home/runcloud/webapps/gmbc/includes/bootstrap.inc).

Why?

The Geelong MTB Club is affiliated with Mountain Bike Australia, the peak national body for Mountain Biking. 

Joining GMBC means you are also joining MTBA, which provides insurance for your riding activities.  Checkout the benefits of MTBA membership here.  If you're not sure what sort of membership you need checkout the Information about Membership/Racing Licences here.