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" encoding="&#x2713;" key="login" uuid="B6CD4962-8156-11F1-8D35-EBC72C3515A0" uri="">
    <field attrs="" key="username" display="Username" value="" id="uuid-B6CD7E0A-8156-11F1-8D35-EBC72C3515A0" widget="text" name="username"/>
    <field name="password" widget="password" id="uuid-B6CDC522-8156-11F1-8D35-EBC72C3515A0" display="Password" key="password" attrs=""/>
    <field name="submit" id="uuid-B6CE15EA-8156-11F1-8D35-EBC72C3515A0" value="" widget="submit" attrs="" key="submit" display="Login"/>
  </form>
</response>