Screen showing errors when using an adapter

[spritiual1]

I have a Xbox one with a VGA to HDMI adapter, I wanted to connect to my screen which is an Acer E1900HQ. When I plugged in the HDMI cable into my Xbox one and into the adapter, I realised that the cable was too big and connected another VGA cable to it and into my monitor. When I turned it on and everything was connected, my screen said that a cable was not connected so it couldn't show up anything

I unplugged the cable and switched it around but the same problem occured.

How do I fix this?

 

[popatim]

Please provide us with a link to the HDMI-VGA adapter you bought. Thank you.