Unable to change an Enrollment title, receive an error message

Summary

I am attempting to change the title of an enrollment which attached to a VILT. When I click on the SAVE button I get an error message and nothing saves.

Content

I've done this process before without issue. I create the VILT and then create the Enrollment. When the Adobe Connect webinar is over, I complete the attendance manually and then change the Enrollment Title. I do this so that it conforms to a saved certificate we use for webinars. However, this time I received the below message:

Error Object reference not set to an instance of an object.; at LDC.BusinessLogic.API.VILT.AdobeConnectMeetingLogic.Get(VILTEvent objVILTEvent, String strSessionKey) at LDC.BusinessLogic.API.VILT.VILTAPILogic.GetEvent(Int32 intEventId, Boolean blnIncludeParticipants) at LDC.BusinessLogic.API.VILT.COM.VILTTrainingSessionCOM.UpdateVILT(String strConnectionString, Int32 intEventId, Int32 intUserId, Decimal intLCID, Object dtStart, Object dtEnd, Int32 intMaxSeats, String strCommandLocation, Int32 enrollmentId)