The AlfieMain log will show you details of the tasks being performed to synchronise the data.
You are receiving the following Unhanded Exception Error:
Unhandled Exception in Student request:System.FormatException: String was not recognized as a valid DateTime.
at System.DateTimeParse.Parse(String s, DateTimeFormatInfo dtfi, DateTimeStyles styles)
at System.DateTime.Parse(String s)
at AlfieFunctions.students.doJob(AlfieWebInterface aWI)
Please make a request to "clear tasks for SIMS-Sync" by emailing firstname.lastname@example.org
By 'clearing the tasks' when SIMS-Sync next runs it will do a fresh pull of all of the data.
Once completed, if the Unhanded Exception Error are still showing, then please contact email@example.com as more investigation may be required.