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 uri="" uuid="2655F9A2-A343-11F0-8695-C9C82F49FC8C" encoding="&#x2713;" method="post" key="login">
    <field widget="text" attrs="" display="Username" name="username" value="" id="uuid-26562CE2-A343-11F0-8695-C9C82F49FC8C" key="username"/>
    <field key="password" id="uuid-2656701C-A343-11F0-8695-C9C82F49FC8C" name="password" display="Password" attrs="" widget="password"/>
    <field name="submit" value="" id="uuid-2656B91E-A343-11F0-8695-C9C82F49FC8C" key="submit" attrs="" widget="submit" display="Login"/>
  </form>
</response>