logo not visible on website

On the website yolandawals.nl I use the free version of the SKT Photo World theme. When I add a logo it’s not visible on the website. It only shows the website title and description.

In a previous version of the theme all worked fine. In the header part there is a message that the prefered height of the image is 0 px. I think this is strange. I can’t crop the image when using or uploading a new image.

The strange part of the story is that the logo is visible a mobile phone. I use css modification. But after removing all modification the logo still does not appear.

Please advise what to do.

Kind regards,

Johan Omlo