Hello, I've got a new XE3 with XF18-55 F2.8-4 kit lens. On the first day, I was able to change aperture using the front dial and also using aperture ring on the lens. But, now, I'm unable to change aperture using the front dial. When I see Aperture Settings, it is grayed out and is not working in camera settings. I have tried putting camera on Aperture Priority, but still the front dial doesn't change the aperture. Is there any other way this front dial can be made to change aperture?