Outdoor module cannot communicate any longer???

Hi

As you can see on this picture, I have placed the outdoor module indoor, and it is functioning very well. Good coverage and battery.

(missing picture showing outdoor module, inside a window) 

(missing picture showing control panel showing batteries are full and everything is fine and showing wifi with 4 bars)

Then I place the Outdoor module just about 40 cm further away on the other side of a window and I have no connection.

(missing picture  showing oudoor module on the other side of window, just 20-40 cm. further away)

(missing picture showing control panel showing no contact with module)

I cannot place the outdoor module closer to the indoor module. It is only 4 meters away, but signal has to go through the window..

What can I do. The outdoor module did just suddenly stop functioning. When it functioned it was 1 meter further away from the indoor module placed on the above pictures, but worked anyway. And I have made no changes to my wifi.

PS would be nice if you could support pictures in this support tool :-)