XSLT Error

Empty filename at /home/ubuntu/perl5/perlbrew/perls/perl-5.18.0/lib/site_perl/5.18.0/Chameleon5/Template/XSLT.pm line 575.

Response XML

<?xml version="1.0"?>
<response>
  <form uuid="8D4B47F4-936F-11F0-893D-A81436923908" method="post" encoding="&#x2713;" key="login" uri="">
    <field value="" id="uuid-8D4B7EE0-936F-11F0-893D-A81436923908" key="username" name="username" display="Username" widget="text" attrs=""/>
    <field widget="password" display="Password" attrs="" name="password" id="uuid-8D4BC51C-936F-11F0-893D-A81436923908" key="password"/>
    <field widget="submit" attrs="" display="Login" value="" name="submit" key="submit" id="uuid-8D4C0FCC-936F-11F0-893D-A81436923908"/>
  </form>
</response>