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 method="post" uri="" uuid="33347EAC-8DB0-11F1-9AE6-3DECF5CBB814" key="login" encoding="&#x2713;">
    <field name="username" key="username" widget="text" value="" id="uuid-3334E3CE-8DB0-11F1-9AE6-3DECF5CBB814" display="Username" attrs=""/>
    <field display="Password" attrs="" id="uuid-33352E60-8DB0-11F1-9AE6-3DECF5CBB814" widget="password" key="password" name="password"/>
    <field id="uuid-333578AC-8DB0-11F1-9AE6-3DECF5CBB814" attrs="" display="Login" name="submit" key="submit" widget="submit" value=""/>
  </form>
</response>