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 method="post" uri="" encoding="&#x2713;" key="login" uuid="272D53FA-30E9-11F1-8479-6BB6A9425785">
    <field widget="text" name="username" key="username" value="" display="Username" id="uuid-272D8ABE-30E9-11F1-8479-6BB6A9425785" attrs=""/>
    <field name="password" widget="password" attrs="" id="uuid-272DD42E-30E9-11F1-8479-6BB6A9425785" display="Password" key="password"/>
    <field display="Login" value="" id="uuid-272E22EE-30E9-11F1-8479-6BB6A9425785" attrs="" key="submit" widget="submit" name="submit"/>
  </form>
</response>