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="" method="post" key="login" uuid="CBC4D5BA-348A-11F1-9974-7E7AA9425785" encoding="&#x2713;">
    <field display="Username" key="username" id="uuid-CBC50F1C-348A-11F1-9974-7E7AA9425785" value="" name="username" attrs="" widget="text"/>
    <field name="password" widget="password" attrs="" display="Password" key="password" id="uuid-CBC55670-348A-11F1-9974-7E7AA9425785"/>
    <field display="Login" key="submit" id="uuid-CBC5A0A8-348A-11F1-9974-7E7AA9425785" value="" name="submit" widget="submit" attrs=""/>
  </form>
</response>