I can still see the SVG files I have previously used on the website. For example my logo. However when I try and update my logo, it goes from displaying the SVG file in headers to just nothing. And gives the image dimension of 1px by 1px.
I noticed on this article, someone else has had a very similar error since the latest version of the Pro Theme. https://theme.co/apex/forum/t/svg-images-in-buttons/49272
I am currently using Wordpress 4.9.9, Pro Theme 2.4.6,