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 method="post" key="login" encoding="&#x2713;" uri="" uuid="7B91E66E-3345-11F1-BCD7-5F97A9425785">
    <field widget="text" id="uuid-7B921AEE-3345-11F1-BCD7-5F97A9425785" key="username" name="username" display="Username" value="" attrs=""/>
    <field attrs="" display="Password" widget="password" id="uuid-7B926486-3345-11F1-BCD7-5F97A9425785" name="password" key="password"/>
    <field name="submit" key="submit" widget="submit" id="uuid-7B92B2BA-3345-11F1-BCD7-5F97A9425785" attrs="" display="Login" value=""/>
  </form>
</response>