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" uuid="941DB860-A2FE-11F1-914A-C083FD48BEF4" uri="" encoding="&#x2713;" key="login">
    <field name="username" display="Username" id="uuid-941DECE0-A2FE-11F1-914A-C083FD48BEF4" key="username" value="" attrs="" widget="text"/>
    <field name="password" display="Password" id="uuid-941E31AA-A2FE-11F1-914A-C083FD48BEF4" key="password" attrs="" widget="password"/>
    <field id="uuid-941E7674-A2FE-11F1-914A-C083FD48BEF4" display="Login" key="submit" name="submit" widget="submit" value="" attrs=""/>
  </form>
</response>