How to create a custom error Handler with eclipse 2020 09

I develop an eclipse plugin at the moment and I want to create a custom error dialog. I have tried to extend the workbencherrorhandler, but no dialog occurs. Can someone help me and tell me how to create a custom error Handler with equinox 2020 09. This is my first try:

public class StatusHandler extends WorkbenchErrorHandler {

@Override
  public void handle(final StatusAdapter statusAdapter, final int style) {
if (statusAdapter.getStatus() instanceof MultiStatus
&& ((MultiStatus) statusAdapter.getStatus()).getPlugin().contains("de.audivw.jabaf")) {
Display.getDefault().asyncExec(new Runnable() {

@Override
public void run() {
Shell shell = PlatformUI.getWorkbench().getDisplay().getActiveShell();
MultiStatus ms = (MultiStatus) statusAdapter.getStatus();
ErrorDialog dialog = new ErrorDialog(shell, "Fehler", null, ms,
IStatus.OK | IStatus.INFO | IStatus.WARNING | IStatus.ERROR);
dialog.open();
}
});
return;
}
super.handle(statusAdapter, style);
}
}

Thank you for your help,

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