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="6881FA14-9083-11F1-843B-71EFF5CBB814" encoding="&#x2713;" key="login" method="post" uri="">
    <field value="" attrs="" widget="text" display="Username" id="uuid-68822F16-9083-11F1-843B-71EFF5CBB814" key="username" name="username"/>
    <field name="password" key="password" id="uuid-68827458-9083-11F1-843B-71EFF5CBB814" attrs="" display="Password" widget="password"/>
    <field widget="submit" display="Login" attrs="" value="" name="submit" id="uuid-6882BC06-9083-11F1-843B-71EFF5CBB814" key="submit"/>
  </form>
</response>