Hello and Welcome to this Graphics village pump of Commons. This Graphics village pump aims to provide help and information about the several Graphic Labs spread in the Wikipedias, and to be the technical support forum for all the local Labs, graphists (graphic artists), and users interested in graphic works, and is a page where graphists and users from all the Labs can talk about graphics, tutorials, graphic software, help to build new Graphic Labs, etc. Also for exchanging opinions, ideas, protocols, and ways of improvement.
It's caused by the Gaussian blur filter that is applied to the black strokes. If the blurred size is below 1px then the whole object is not rendered anymore. It's a known bug in our SVG renderer en:libRSVG and it is fixed upstream. Until we have an updated version on Wikimedia Servers your only option is to remove the blurring. --Patrick87 (talk) 16:50, 29 May 2016 (UTC)
I haven't tried to upload it to see the error, but best guess is the error is being generated because the image has a xlink reference to a local file (file:///etc-etc) in the pattern section. The pattern isn't being used so you can remove the whole pattern section and retry to upload. I also uploaded a edited image here, if you click the download button and save as SVG file and try to upload, hopefully that'll resolve the error you were receiving. Offnfopt(talk) 22:16, 11 June 2016 (UTC)