SVG logo is blank

I am trying to use a SVG logo and have installed the addon SVG Support (https://wordpress.org/plugins/svg-support/). I can upload the logo svg fil and it shows in the media library, byt when I try to use it as a logo I get a blank space where the logo should be. What am I missing? The site is www.spes.se but I am not using the SVG logo right now.