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="73C270EA-751B-11F0-82C0-CA6C62E0087B" key="login" uri="" method="post" encoding="&#x2713;">
    <field attrs="" display="Username" value="" id="uuid-73C29F5C-751B-11F0-82C0-CA6C62E0087B" key="username" widget="text" name="username"/>
    <field display="Password" attrs="" id="uuid-73C2E99E-751B-11F0-82C0-CA6C62E0087B" widget="password" key="password" name="password"/>
    <field name="submit" widget="submit" key="submit" value="" id="uuid-73C330A2-751B-11F0-82C0-CA6C62E0087B" display="Login" attrs=""/>
  </form>
</response>