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 key="login" uri="" uuid="332214EC-9099-11F1-9C15-A59FFD48BEF4" method="post" encoding="&#x2713;">
    <field attrs="" name="username" id="uuid-33224BEC-9099-11F1-9C15-A59FFD48BEF4" key="username" widget="text" display="Username" value=""/>
    <field key="password" widget="password" id="uuid-33229692-9099-11F1-9C15-A59FFD48BEF4" attrs="" name="password" display="Password"/>
    <field key="submit" widget="submit" name="submit" attrs="" id="uuid-3322E2DC-9099-11F1-9C15-A59FFD48BEF4" display="Login" value=""/>
  </form>
</response>