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 uuid="D1642552-CE9A-11F1-A971-BA992C684F3D" method="post" encoding="&#x2713;" key="login" uri="">
    <field value="" widget="text" display="Username" id="uuid-D1645AA4-CE9A-11F1-A971-BA992C684F3D" name="username" extra="" key="username" attrs=""/>
    <field attrs="" key="password" display="Password" id="uuid-D164A1B2-CE9A-11F1-A971-BA992C684F3D" name="password" extra="" widget="password"/>
    <field extra="" name="submit" id="uuid-D164E99C-CE9A-11F1-A971-BA992C684F3D" attrs="" key="submit" widget="submit" display="Login" value=""/>
  </form>
</response>