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 uri="" method="post" uuid="91179F4E-8113-11F1-BE99-096F1BBD9EFC" key="login" encoding="&#x2713;">
    <field display="Username" key="username" attrs="" value="" id="uuid-9117D554-8113-11F1-BE99-096F1BBD9EFC" widget="text" name="username"/>
    <field widget="password" attrs="" id="uuid-91181AE6-8113-11F1-BE99-096F1BBD9EFC" name="password" display="Password" key="password"/>
    <field name="submit" widget="submit" id="uuid-91186438-8113-11F1-BE99-096F1BBD9EFC" attrs="" value="" key="submit" display="Login"/>
  </form>
</response>