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 encoding="&#x2713;" uuid="5F07869A-3C03-11F1-8EEB-BDD00C0019C7" method="post" uri="" key="login">
    <field value="" name="username" widget="text" key="username" display="Username" attrs="" id="uuid-5F07B75A-3C03-11F1-8EEB-BDD00C0019C7"/>
    <field widget="password" key="password" name="password" id="uuid-5F07FDA0-3C03-11F1-8EEB-BDD00C0019C7" attrs="" display="Password"/>
    <field value="" name="submit" widget="submit" key="submit" display="Login" attrs="" id="uuid-5F084850-3C03-11F1-8EEB-BDD00C0019C7"/>
  </form>
</response>