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="14D877C0-9738-11F0-90A7-193055FD9ABD" encoding="&#x2713;" key="login" uri="" method="post">
    <field value="" widget="text" key="username" id="uuid-14D8AA88-9738-11F0-90A7-193055FD9ABD" name="username" display="Username" attrs=""/>
    <field widget="password" key="password" id="uuid-14D8F100-9738-11F0-90A7-193055FD9ABD" name="password" display="Password" attrs=""/>
    <field widget="submit" value="" key="submit" id="uuid-14D93D9A-9738-11F0-90A7-193055FD9ABD" name="submit" display="Login" attrs=""/>
  </form>
</response>