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="" key="login" uuid="45A6E6A4-1A7B-11F1-AAD6-3E73A9425785" encoding="&#x2713;" method="post">
    <field name="username" widget="text" display="Username" value="" attrs="" key="username" id="uuid-45A717A0-1A7B-11F1-AAD6-3E73A9425785"/>
    <field name="password" widget="password" id="uuid-45A7632C-1A7B-11F1-AAD6-3E73A9425785" key="password" attrs="" display="Password"/>
    <field widget="submit" name="submit" value="" attrs="" display="Login" id="uuid-45A7AB48-1A7B-11F1-AAD6-3E73A9425785" key="submit"/>
  </form>
</response>