Hi natmaxex,
To get the scene capture image into your image widget you have to rely on the render target texture rather than the scene capture component.
The binding that you have created on the image widget needs removing. Instead, create a new material, set the Material Domain to User Interface then add a Texture Sampler node with the render target you are using on the scene capture added to it. Attach the RGB pin to the Final Color pin. Then use that material in the image widget (and set the image size).