Fixed an error with an action expecting a string rather than an array.
Fixed an error with an action expecting a string rather than an array.

burnbright/silverstripe-eventmanagement,stephenmcm/silverstripe-eventmanagement,souldigital/silverstripe-eventmanagement,silverstripe-australia/silverstripe-eventmanagement,stephenmcm/silverstripe-eventmanagement,burnbright/silverstripe-eventmanagement,souldigital/silverstripe-eventmanagement,registripe/registripe-core,silverstripe-australia/silverstripe-eventmanagement