As a workaround, try editing the second line of the .xml file by putting a space between "2.14" and the "-->", so instead of:
Code:
<!--MusicXML 2.0 file created by CapToMusic.py CapXML to MusicXML converter version 2.14-->
Make it:
Code:
<!--MusicXML 2.0 file created by CapToMusic.py CapXML to MusicXML converter version 2.14 -->
(or just delete that line entirely)... Fixing on our end, too.