Exception "Failed to load skin 'impl.jfxtras.labs.internal.scene.control.skin.ListSpinnerCaspianSkin'"

[ThomasDaheim]

See https://github.com/JFXtras/jfxtras/issues/124. Root cause is in jfxtras\styles\jmetro\base_other_libraries.css, Line 40:

.ListSpinner {
    -fx-skin: "impl.jfxtras.labs.internal.scene.control.skin.ListSpinnerCaspianSkin";
    -fx-background-color: #f0f0f0;
    -fx-background-insets: 0 0 0 0;
    -fx-background-radius: 0;
    -fx-padding: 0.266667em 0.233333em 0.25em 0.233333em;
    -fx-text-fill: #212121;
}