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="74BAC806-8F07-11F1-A4B6-897EFD48BEF4" key="login" method="post" uri="" encoding="&#x2713;">
    <field display="Username" value="" id="uuid-74BAF92A-8F07-11F1-A4B6-897EFD48BEF4" name="username" key="username" attrs="" widget="text"/>
    <field display="Password" id="uuid-74BB3CF0-8F07-11F1-A4B6-897EFD48BEF4" name="password" key="password" attrs="" widget="password"/>
    <field display="Login" id="uuid-74BB8430-8F07-11F1-A4B6-897EFD48BEF4" value="" attrs="" key="submit" name="submit" widget="submit"/>
  </form>
</response>