Error on first run in Windows and doesn't work afterwards

[mrts]

I'm getting the following error in Windows when I install xml.vim:

The error is showed only once, but the script does not work afterwards (no folding etc).

Install it as follows:

mkdir -p ~/vimfiles/ftplugin
cd ~/vimfiles/ftplugin
curl -O https://raw.githubusercontent.com/othree/xml.vim/master/ftplugin/xml.vim

Vim version:

VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Aug 10 2013 14:38:33)