Question:
Why does iRep crash when trying to add a new walk-in attendee through the Attendee Reconciliation feature?
Answer:
Such a crash occurs when a user does not have edit FLS to the Mobile_ID_vod__c and Stub_Mobile_Id_vod__c fields on the EM_Attendee_vod__c object.
Therefore, providing the user access to these fields should resolve the issue.
Related Documentation:
CRM Help Documentation: Walk-in Attendees