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="FAC36288-3704-11F1-B0F8-1ED7A9425785" method="post" uri="" key="login" encoding="&#x2713;">
    <field id="uuid-FAC394D8-3704-11F1-B0F8-1ED7A9425785" attrs="" key="username" widget="text" display="Username" name="username" value=""/>
    <field display="Password" name="password" widget="password" attrs="" key="password" id="uuid-FAC3D9DE-3704-11F1-B0F8-1ED7A9425785"/>
    <field value="" name="submit" display="Login" key="submit" attrs="" widget="submit" id="uuid-FAC428D0-3704-11F1-B0F8-1ED7A9425785"/>
  </form>
</response>