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 key="login" encoding="&#x2713;" uuid="C7B6E546-37F3-11F1-8542-EBBE0C0019C7" uri="" method="post">
    <field widget="text" id="uuid-C7B71ACA-37F3-11F1-8542-EBBE0C0019C7" key="username" display="Username" attrs="" name="username" value=""/>
    <field display="Password" key="password" id="uuid-C7B76386-37F3-11F1-8542-EBBE0C0019C7" widget="password" name="password" attrs=""/>
    <field value="" name="submit" attrs="" key="submit" display="Login" widget="submit" id="uuid-C7B7ACA6-37F3-11F1-8542-EBBE0C0019C7"/>
  </form>
</response>