Incremental Refresh - RangeStart - current value "Enter a DateTime value" error

I'm trying to set up an incremental refresh on one of my queries in PowerBI.

I've set up a new parameter called RangeStart - changed the type to Date/Time but whenever I try putting the Current Value in I keep getting an error message saying "Enter a DataTime value".

I've tried different formats dd/mm/yyyy hh:mm:ss:AM      mm/dd/yyyy hh:mm:ss    etc and I've tried similar formats to those listed on the Microsoft LEarn site and also from watching Youtube videos about setting this up - but no matter which format I use I still keep getting the same error message.

Can someone please let me know which date/time format I should be using to progress this?