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="" encoding="&#x2713;" uuid="5F7936D8-4F44-11F1-A25A-69241BBD9EFC" method="post" key="login">
    <field name="username" key="username" value="" attrs="" widget="text" id="uuid-5F796D92-4F44-11F1-A25A-69241BBD9EFC" display="Username"/>
    <field key="password" name="password" id="uuid-5F79B978-4F44-11F1-A25A-69241BBD9EFC" display="Password" attrs="" widget="password"/>
    <field key="submit" name="submit" value="" attrs="" widget="submit" display="Login" id="uuid-5F7A039C-4F44-11F1-A25A-69241BBD9EFC"/>
  </form>
</response>