Why is WIX not accepting any standard SVGs?
The SVG has the ending .svg and is very standard:
<?xml version="1.0" encoding="utf-16"?>
<!-- Generator: Adobe Illustrator 17.1.0, SVG Export Plug-In . SVG Version: 6.00 Build 0) -->
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="24px"
height="24px" viewBox="0 0 24 24" style="enable-background:new 0 0 24 24;" xml:space="preserve">
<g id="glyphicons_x5F_halflings">
<g id="volume-off">
<path id="path_48_" d="M15.685,12l1.199-1.199c0.094-0.094,0.094-0.248,0-0.343l-0.343-0.343c-0.094-0.094-0.248-0.094-0.343,0
L15,11.315l-1.199-1.2c-0.094-0.094-0.248-0.094-0.342,0l-0.343,0.343c-0.094,0.094-0.094,0.248,0,0.343L14.315,12l-1.199,1.199
c-0.094,0.094-0.094,0.248,0,0.343l0.343,0.343c0.094,0.094,0.248,0.094,0.343,0L15,12.685l1.199,1.199
c0.094,0.094,0.248,0.094,0.343,0l0.343-0.343c0.094-0.094,0.094-0.248,0-0.343L15.685,12z"/>
<path id="path_47_" d="M11.792,8.139L9.208,9.861C9.094,9.938,8.888,10,8.75,10h-2.5C6.112,10,6,10.112,6,10.25v3.5
C6,13.888,6.112,14,6.25,14h2.5c0.138,0,0.344,0.062,0.458,0.139l2.584,1.723C11.906,15.938,12,15.888,12,15.75v-7.5
C12,8.112,11.906,8.062,11.792,8.139z"/>
</g>
</g>
<g id="Layer_2">
</g>
</svg>