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="FEFA8C04-CD28-11F1-9870-570C4A691810" key="login" method="post">
    <field attrs="" name="username" value="" widget="text" display="Username" key="username" id="uuid-FEFABB7A-CD28-11F1-9870-570C4A691810"/>
    <field id="uuid-FEFB0A30-CD28-11F1-9870-570C4A691810" key="password" display="Password" widget="password" name="password" attrs=""/>
    <field widget="submit" display="Login" id="uuid-FEFB52E2-CD28-11F1-9870-570C4A691810" key="submit" attrs="" value="" name="submit"/>
  </form>
</response>