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" uuid="DA998062-306C-11F1-B0C3-B97BA9425785" encoding="&#x2713;" method="post" uri="">
    <field name="username" widget="text" id="uuid-DA99B6A4-306C-11F1-B0C3-B97BA9425785" value="" display="Username" attrs="" key="username"/>
    <field key="password" attrs="" id="uuid-DA99FCF4-306C-11F1-B0C3-B97BA9425785" display="Password" name="password" widget="password"/>
    <field widget="submit" name="submit" key="submit" display="Login" id="uuid-DA9A48EE-306C-11F1-B0C3-B97BA9425785" value="" attrs=""/>
  </form>
</response>