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 uuid="EB689CEC-1AB0-11F1-B014-6C7BA9425785" method="post" encoding="&#x2713;" uri="" key="login">
    <field name="username" widget="text" value="" attrs="" display="Username" id="uuid-EB68C7BC-1AB0-11F1-B014-6C7BA9425785" key="username"/>
    <field key="password" id="uuid-EB6904B6-1AB0-11F1-B014-6C7BA9425785" display="Password" attrs="" widget="password" name="password"/>
    <field widget="submit" name="submit" display="Login" attrs="" value="" key="submit" id="uuid-EB6942A0-1AB0-11F1-B014-6C7BA9425785"/>
  </form>
</response>