Unable to add Logo Customizr Theme

Hi, I was wondering what I am doing wrong with not being able to add a logo in Customizr. I am using the recommended 250×100 dimensions and have tried both .jpg and .png file types. In the theme customization where it asks you to select a photo it doesn’t seem to register. It uploads fine but nothing shows.

What am I doing wrong?

Thanks

https://gwmac.com