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="52719F9E-6E10-11F1-8501-7E591BBD9EFC" uri="" method="post" encoding="&#x2713;" key="login">
    <field id="uuid-5271D78E-6E10-11F1-8501-7E591BBD9EFC" name="username" key="username" attrs="" value="" display="Username" widget="text"/>
    <field widget="password" key="password" name="password" id="uuid-52721F6E-6E10-11F1-8501-7E591BBD9EFC" display="Password" attrs=""/>
    <field widget="submit" value="" attrs="" display="Login" key="submit" name="submit" id="uuid-52726EE2-6E10-11F1-8501-7E591BBD9EFC"/>
  </form>
</response>