When trying to create an Event Speaker, the user sees the following error: Record Type ID: this ID value isn't valid for the user: <Record Type ID>
With frequency, a System Admin is setting the Events setting through Permission Sets. The user remains with the Master Record Type set as Default at the Profile level.
Set a default Record Type other than Master at the Profile level. All other record types can be added as Permission Sets, but at least one must be set, other than Master, at the Profile level.
CRM Help Documentation: Speaker Management