Whatever you're using to generate the font is spitting out incorrect xml. Specifically the encoding of the file is wrong, for example dragging the file into Google Chrome window will trigger an error too. (it should just load in and display as a tree)
The error is specifically the name of the font face, it contains a non-ascii character, but the file itself doesn't have any encoding set on it. Edit the file and remove the Æ character to fix it.
It would have probably worked if you picked text output instead of xml.