main class not found

[msiejak]

Stack trace:

Error: Could not find or load main class arm.main.ArmApplication
Caused by: java.lang.NoClassDefFoundError: javafx/application/Application

[AmrDeveloper]

Hello, @msiejak Thanks for this issue,
can you provide more information about the environment for example JDK version, OS and screenshots,
And if you using Linux make sure you have javafx jar in your jdk

[AmrDeveloper]

I think you need JavaFX library jar into your JDK because it can't find the Application class, you can download it and add it to your jdk