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" method="post" uri="" uuid="42AA5778-6EB0-11F0-AFEF-2B7C160DF820" encoding="&#x2713;">
    <field widget="text" value="" key="username" name="username" attrs="" display="Username" id="uuid-42AA8DF6-6EB0-11F0-AFEF-2B7C160DF820"/>
    <field widget="password" id="uuid-42AAD414-6EB0-11F0-AFEF-2B7C160DF820" key="password" name="password" attrs="" display="Password"/>
    <field value="" widget="submit" id="uuid-42AB1848-6EB0-11F0-AFEF-2B7C160DF820" display="Login" key="submit" attrs="" name="submit"/>
  </form>
</response>