NB on Linux platform and Java FX trouble

[Luciano Schiavone]

I installed NB 11.2 on Linux Mint 19 (Tina) with openjdk-11-jdk and
libopenjfx-java.

When I try to create a Java FXML application NB tells me that the platform
doesn't support Java FX. There is anybody else who had the same problem?