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="34764496-4F79-11F1-B2C9-B72D1BBD9EFC" method="post" key="login" uri="" encoding="&#x2713;">
    <field display="Username" id="uuid-3476789E-4F79-11F1-B2C9-B72D1BBD9EFC" widget="text" attrs="" value="" name="username" key="username"/>
    <field id="uuid-3476BD7C-4F79-11F1-B2C9-B72D1BBD9EFC" display="Password" attrs="" widget="password" key="password" name="password"/>
    <field name="submit" key="submit" value="" attrs="" widget="submit" display="Login" id="uuid-347708EA-4F79-11F1-B2C9-B72D1BBD9EFC"/>
  </form>
</response>