This just happoend to me
java.lang.AssertionError
at javafx.scene.Node.impl_processCSS(Node.java:7486)
at com.sun.javafx.scene.control.skin.TableColumnHeader.updateSortOrderDots(TableColumnHeader.java:477)
at com.sun.javafx.scene.control.skin.TableColumnHeader.updateSortGrid(TableColumnHeader.java:454)
at com.sun.javafx.scene.control.skin.TableColumnHeader.setSortPos(TableColumnHeader.java:384)
at com.sun.javafx.scene.control.skin.TableColumnHeader.<init>(TableColumnHeader.java:103)
java.lang.AssertionError
at javafx.scene.Node.impl_processCSS(Node.java:7486)
at com.sun.javafx.scene.control.skin.TableColumnHeader.updateSortOrderDots(TableColumnHeader.java:477)
at com.sun.javafx.scene.control.skin.TableColumnHeader.updateSortGrid(TableColumnHeader.java:454)
at com.sun.javafx.scene.control.skin.TableColumnHeader.setSortPos(TableColumnHeader.java:384)
at com.sun.javafx.scene.control.skin.TableColumnHeader.<init>(TableColumnHeader.java:103)