I get an error "Error occurred during initialization of boot layer , java.lang.module.FindException: Module javafx.base not found".
I have prepared (upload referene 020_10_09_4Ko4fLbfABn6e2kG) two seemingly equivalent projects. TestJavaFX3 gives this error when executing it. TestJavaFX4 works OK. I have built both projects following the instructions in https://www.jetbrains.com/help/idea/javafx.html.
Both projects have the same code and - as far as I can tell - the same configuration (libraries, dependencies, VM options). I just can't spot any difference.