Any XPP users have been able to successfully typeset Khmer ? We are coming up with an illegal character and no clue what to do. We are using the font LeelawadeeUI.

The yellow highlighted character is the issue --- which we have in several places.  The font we are using is LeelawadeeUI-Bold and LeelawadeeUI-Regular.


The language is Khmer --- for Cambodian users.

We are using XPP 9.6.1  on a Linux box.