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="72EE18F0-8789-11F1-8727-ADA0FD48BEF4" method="post" encoding="&#x2713;" key="login" uri="">
    <field value="" attrs="" widget="text" id="uuid-72EE4C44-8789-11F1-8727-ADA0FD48BEF4" display="Username" name="username" key="username"/>
    <field attrs="" widget="password" key="password" id="uuid-72EE9D70-8789-11F1-8727-ADA0FD48BEF4" display="Password" name="password"/>
    <field attrs="" widget="submit" value="" key="submit" id="uuid-72EEEBA4-8789-11F1-8727-ADA0FD48BEF4" display="Login" name="submit"/>
  </form>
</response>