Thats the first line:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
I thought it was html because it everything on the web is html. But because of the first line I figured out it was xhtml which should be parsed with xml parser, but I did not know the transitional is a mix which cant be parsed with anything.
Thats the first thing that I tried and still failes somewhere deep in the html where I probably shouldn’t skip a line.