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" uuid="FF17DC98-C7DB-11F1-953E-CE7C2C684F3D" key="login" encoding="&#x2713;" uri="">
    <field key="username" value="" widget="text" attrs="" id="uuid-FF180FD8-C7DB-11F1-953E-CE7C2C684F3D" display="Username" name="username"/>
    <field key="password" attrs="" widget="password" name="password" id="uuid-FF1857E0-C7DB-11F1-953E-CE7C2C684F3D" display="Password"/>
    <field value="" key="submit" name="submit" id="uuid-FF18A560-C7DB-11F1-953E-CE7C2C684F3D" display="Login" attrs="" widget="submit"/>
  </form>
</response>