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 key="login" encoding="&#x2713;" uuid="645E14A4-CDF0-11F1-86A7-1F0DB4F3B997" uri="" method="post">
    <field name="username" widget="text" value="" key="username" display="Username" id="uuid-645E47D0-CDF0-11F1-86A7-1F0DB4F3B997" attrs=""/>
    <field display="Password" id="uuid-645E915E-CDF0-11F1-86A7-1F0DB4F3B997" key="password" attrs="" widget="password" name="password"/>
    <field widget="submit" name="submit" display="Login" attrs="" key="submit" id="uuid-645EE212-CDF0-11F1-86A7-1F0DB4F3B997" value=""/>
  </form>
</response>