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="FB84797A-28FC-11F1-AA66-EDA7C27BCFD7" encoding="&#x2713;" uri="" key="login" method="post">
    <field value="" widget="text" key="username" display="Username" id="uuid-FB84ADB4-28FC-11F1-AA66-EDA7C27BCFD7" attrs="" name="username"/>
    <field name="password" attrs="" display="Password" id="uuid-FB84F1F2-28FC-11F1-AA66-EDA7C27BCFD7" key="password" widget="password"/>
    <field id="uuid-FB8537F2-28FC-11F1-AA66-EDA7C27BCFD7" display="Login" name="submit" attrs="" widget="submit" value="" key="submit"/>
  </form>
</response>