Create a Teller with From date but no End date. Then fill Cashier for Teller form entering some from date and to date. The platform returns 500:"Internal Server Error"
message:"Partial cannot be null"
To reproduce this, see "Perpetual Teller" in https://demo.openmf.org which has no end date and try to add a cashier with some valid from and to date. Or follow the above steps.