In Connect 9.1 or later, when using an API call to set a time for when your seminar will run, you may encounter the following error response:
<results> <status code="invalid"> <invalid field="date-begin" type="string" subcode="not-allowed"/> </status> </results>
This indicates that you are attempting to schedule a seminar for a time that overlaps with another seminar using the same seminar license. Check the schedule for the seminar license to find an available time slot. Also, please see this blog post for details on Using the Connect API to create and schedule seminars.