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 uri="" method="post" encoding="&#x2713;" uuid="2B4C13A6-426C-11F1-9382-7495A9425785" key="login">
    <field key="username" id="uuid-2B4C4650-426C-11F1-9382-7495A9425785" name="username" display="Username" attrs="" widget="text" value=""/>
    <field name="password" attrs="" display="Password" widget="password" key="password" id="uuid-2B4C8CC8-426C-11F1-9382-7495A9425785"/>
    <field name="submit" display="Login" attrs="" widget="submit" value="" key="submit" id="uuid-2B4CD5E8-426C-11F1-9382-7495A9425785"/>
  </form>
</response>