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="" encoding="&#x2713;" method="post" key="login" uuid="D13C3746-6855-11F1-8100-54DB8F49F76F">
    <field widget="text" value="" attrs="" id="uuid-D13C6C5C-6855-11F1-8100-54DB8F49F76F" display="Username" key="username" name="username"/>
    <field name="password" key="password" display="Password" id="uuid-D13CB48C-6855-11F1-8100-54DB8F49F76F" attrs="" widget="password"/>
    <field key="submit" name="submit" display="Login" id="uuid-D13D022A-6855-11F1-8100-54DB8F49F76F" attrs="" value="" widget="submit"/>
  </form>
</response>