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="EC8E7D1C-6EC6-11F0-9D86-1FE0ED0FA296" method="post" uri="" encoding="&#x2713;" key="login">
    <field display="Username" attrs="" name="username" id="uuid-EC8EB73C-6EC6-11F0-9D86-1FE0ED0FA296" value="" widget="text" key="username"/>
    <field attrs="" display="Password" name="password" id="uuid-EC8F023C-6EC6-11F0-9D86-1FE0ED0FA296" widget="password" key="password"/>
    <field attrs="" display="Login" key="submit" widget="submit" value="" id="uuid-EC8F5778-6EC6-11F0-9D86-1FE0ED0FA296" name="submit"/>
  </form>
</response>