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 method="post" uri="" key="login" encoding="&#x2713;" uuid="C6FE6666-8A59-11F1-BC81-8169400CC38E">
    <field id="uuid-C6FE9E24-8A59-11F1-BC81-8169400CC38E" value="" name="username" display="Username" widget="text" key="username" attrs=""/>
    <field attrs="" key="password" widget="password" display="Password" name="password" id="uuid-C6FEE370-8A59-11F1-BC81-8169400CC38E"/>
    <field id="uuid-C6FF2DE4-8A59-11F1-BC81-8169400CC38E" value="" name="submit" widget="submit" display="Login" key="submit" attrs=""/>
  </form>
</response>