So I'm adding my requires for module-info.java and finally got my program to load but as soon as tab pane wants to load from jfoenix library this error is thrown.
Caused by: java.lang.IllegalAccessError: class com.jfoenix.skins.JFXTabPaneSkin (in module com.jfoenix) cannot access class com.sun.javafx.scene.control.behavior.TabPaneBehavior (in module javafx.controls) because module javafx.controls does not export com.sun.javafx.scene.control.behavior to module com.jfoenix
One way you can try fixing this is by adding the vm option for the required export:
--add-exports javafx.controls/com.sun.javafx.scene.control.behavior=com.jfoenix
The ideal solution to that would be the jfoenix library to move away from using com.sun.javafx.scene.control.behavior.TabPaneBehavior.