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" encoding="&#x2713;" key="login" uuid="7D21AFC2-3206-11F1-81E3-289E0C0019C7" uri="">
    <field value="" id="uuid-7D21E2E4-3206-11F1-81E3-289E0C0019C7" display="Username" name="username" key="username" widget="text" attrs=""/>
    <field id="uuid-7D222C36-3206-11F1-81E3-289E0C0019C7" key="password" name="password" display="Password" widget="password" attrs=""/>
    <field widget="submit" attrs="" value="" id="uuid-7D22779A-3206-11F1-81E3-289E0C0019C7" name="submit" key="submit" display="Login"/>
  </form>
</response>