Hub CB-C26 HDMI not working

Hi !

I ordered the USB C hub CB-C26 to connect my USB devices (Steelseries mouse and headset) and my monitor (HP 24w 23.8-inch Display) via HDMI to my laptop ( Lenovo IdeaPad Gaming 3 15IMH05 - 81Y400F7MH). When I connected the hub to my laptop the USB devices work just fine, but my HDMI connection failes and I can not use my monitor.

Can anyone point me in the right direction or indicate what the problem might be?