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 uri="" uuid="C8796E50-4E27-11F1-9E45-43451BBD9EFC" encoding="&#x2713;" key="login" method="post">
    <field id="uuid-C879A190-4E27-11F1-9E45-43451BBD9EFC" attrs="" widget="text" display="Username" name="username" key="username" value=""/>
    <field display="Password" name="password" key="password" id="uuid-C879E632-4E27-11F1-9E45-43451BBD9EFC" attrs="" widget="password"/>
    <field value="" name="submit" key="submit" display="Login" widget="submit" attrs="" id="uuid-C87A30CE-4E27-11F1-9E45-43451BBD9EFC"/>
  </form>
</response>