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 uri="" key="login" uuid="936D9EF0-A1AE-11F0-9977-92343049FC8C" encoding="&#x2713;" method="post">
    <field value="" display="Username" widget="text" attrs="" name="username" id="uuid-936DD514-A1AE-11F0-9977-92343049FC8C" key="username"/>
    <field display="Password" widget="password" name="password" attrs="" key="password" id="uuid-936E190C-A1AE-11F0-9977-92343049FC8C"/>
    <field widget="submit" value="" display="Login" id="uuid-936E5F70-A1AE-11F0-9977-92343049FC8C" key="submit" attrs="" name="submit"/>
  </form>
</response>