We've created a VuMark using string as the type. Using the Illustrator template, it passes all requirements and exported the SVG. Upon upload to the target manager it fails without any further information. It was our understanding that if it passed verification in the Illustrator template, it would be fine once uploaded but this doesn't seem to be the case.
Upon a closer look, I believe my dark/light elements are too close to each other. I will modify and follow up with my findings.