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" key="login" uri="" uuid="E2096852-6B28-11F1-B994-4405F9248A5F" encoding="&#x2713;">
    <field name="username" id="uuid-E2099804-6B28-11F1-B994-4405F9248A5F" key="username" widget="text" attrs="" display="Username" value=""/>
    <field attrs="" display="Password" widget="password" key="password" id="uuid-E209E48A-6B28-11F1-B994-4405F9248A5F" name="password"/>
    <field key="submit" id="uuid-E20A30D4-6B28-11F1-B994-4405F9248A5F" name="submit" value="" attrs="" display="Login" widget="submit"/>
  </form>
</response>