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="E5225588-365F-11F1-A6EE-2297A9425785" method="post" uri="">
    <field display="Username" name="username" value="" id="uuid-E522876A-365F-11F1-A6EE-2297A9425785" key="username" attrs="" widget="text"/>
    <field id="uuid-E522D0D0-365F-11F1-A6EE-2297A9425785" widget="password" attrs="" key="password" display="Password" name="password"/>
    <field value="" name="submit" display="Login" key="submit" attrs="" widget="submit" id="uuid-E52318BA-365F-11F1-A6EE-2297A9425785"/>
  </form>
</response>