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="E96E6444-CD07-11F1-8AA5-29C48D6E13F8" uri="">
    <field value="" id="uuid-E96E9D88-CD07-11F1-8AA5-29C48D6E13F8" name="username" attrs="" display="Username" key="username" widget="text"/>
    <field widget="password" key="password" attrs="" display="Password" name="password" id="uuid-E96EE680-CD07-11F1-8AA5-29C48D6E13F8"/>
    <field widget="submit" key="submit" attrs="" display="Login" name="submit" value="" id="uuid-E96F2FFA-CD07-11F1-8AA5-29C48D6E13F8"/>
  </form>
</response>