KeyTable sort of working, but not allowing editing of cells directly

I know I must be missing something very basic, but have tried ll sorts of things and cannot figure out what is wrong. I am trying to get this table to full excel like functionality and so want keys to be able to edit. I think I set it up correctly, have tried all the settings and tried the examples and it just does not work, all the other features work, but it won't let me edit the cells inline.
Here is a current example:
https://newyorklife.acms.com/plnr3zzewp46/
Thanks in advance!