RSS down HELP!

I don’t know why, but my RSS feed stopped working
This is what I get when trying to go on it with firefox

XML Parsing Error: xml declaration not at start of external entity
Location: https://www.facethemusik.net/feed/
Line Number 2, Column 1:<?xml version="1.0" encoding="UTF-8"?>
^

and page doesn’t load with IE
same thing for comments RSS

What the heck happened?
I installed a vBulletin forum last night, but that’s in a different folder