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="A1BCD748-3FAE-11F1-9BAE-8D212697109C" key="login" encoding="&#x2713;" uri="" method="post">
    <field display="Username" name="username" id="uuid-A1BD0E52-3FAE-11F1-9BAE-8D212697109C" widget="text" value="" attrs="" key="username"/>
    <field name="password" display="Password" key="password" attrs="" widget="password" id="uuid-A1BD54B6-3FAE-11F1-9BAE-8D212697109C"/>
    <field widget="submit" id="uuid-A1BDA128-3FAE-11F1-9BAE-8D212697109C" value="" key="submit" attrs="" display="Login" name="submit"/>
  </form>
</response>