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" uri="" method="post" uuid="3AED8A50-3E80-11F1-A0C2-2CC87F2D798A" encoding="&#x2713;">
    <field key="username" value="" attrs="" name="username" display="Username" id="uuid-3AEDB2AA-3E80-11F1-A0C2-2CC87F2D798A" widget="text"/>
    <field attrs="" key="password" id="uuid-3AEDD898-3E80-11F1-A0C2-2CC87F2D798A" display="Password" name="password" widget="password"/>
    <field attrs="" value="" key="submit" display="Login" id="uuid-3AEDF6CA-3E80-11F1-A0C2-2CC87F2D798A" name="submit" widget="submit"/>
  </form>
</response>