how do you “install Titanium” what do you mean with this?
do you mean just the latest (2022.3.1) developer?
and then you just run your smart client solution in that? (that has still nothing todo with the Titanium NGClient)
but this error about sun.java2d needs that export yes so something like that should work but maybe you can also add:
–add-opens java.desktop/sun.java2d=ALL-UNNAMED