JavaFX ScrollPane not scrolling with VBox

I have a scrollpane on my screen and a vbox inside it. I add numerous checkboxes in this vbox (and I see it expanding) but the scrollpane doesn't seem to know that it should start showing a scrollbar when the content exceeds the height of that pane. I already tried changing the scrollbar policy but it just shows a scrollbar, I can't actually scroll. How do I fix this?

private void addCheckbox(String checkbox){
        CheckBox c = new CheckBox(checkbox);
        c.setPadding(this.paddingCheckBoxes);
        c.setSelected(true);
        this.vBoxFilters.getChildren().add(c);
    }

Here's the fxml:

<StackPane>
     <children>
          <ScrollPane fx:id="scrollPaneFilters" prefHeight="878.0" prefWidth="260.0">
            <content>
              <VBox fx:id="vBoxFilters" minHeight="0.0" minWidth="0.0" prefHeight="200.0" prefWidth="200.0" />
            </content>
          </ScrollPane>
     </children>
  </StackPane>

Try to remove prefHeight for VBox in your fxml