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="B546F002-6C6C-11F0-B55E-73C0F3489F51" method="post" key="login">
    <field attrs="" name="username" key="username" widget="text" display="Username" value="" id="uuid-B5472004-6C6C-11F0-B55E-73C0F3489F51"/>
    <field id="uuid-B5476AB4-6C6C-11F0-B55E-73C0F3489F51" display="Password" widget="password" key="password" attrs="" name="password"/>
    <field display="Login" id="uuid-B547B3FC-6C6C-11F0-B55E-73C0F3489F51" value="" attrs="" name="submit" widget="submit" key="submit"/>
  </form>
</response>