The svg-file at [[https://commons.wikimedia.org/wiki/File:Socialist_Party_logo.svg|File:Socialist_Party_logo.svg]] does not render a proper thumbnail, it turns out as blank on most (?) wikis. Loading of the svg-file itself renders as expected.
If loaded into Inkscape and then reuploaded a security warning is issued
It reads "Upload warning" and then "Found href to unsecure data: URI-target…"