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 encoding="&#x2713;" uri="" uuid="9AA3D64E-AAB9-11F0-B6DE-6E40DBBCD7F8" key="login" method="post">
    <field name="username" widget="text" value="" attrs="" key="username" id="uuid-9AA4086C-AAB9-11F0-B6DE-6E40DBBCD7F8" display="Username"/>
    <field id="uuid-9AA45330-AAB9-11F0-B6DE-6E40DBBCD7F8" display="Password" key="password" attrs="" widget="password" name="password"/>
    <field key="submit" id="uuid-9AA4A0BA-AAB9-11F0-B6DE-6E40DBBCD7F8" display="Login" value="" attrs="" name="submit" widget="submit"/>
  </form>
</response>