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" key="login" uri="" encoding="&#x2713;" uuid="904AE0B0-9CB9-11F0-8EED-16B4455C7DD5">
    <field display="Username" id="uuid-904B171A-9CB9-11F0-8EED-16B4455C7DD5" value="" name="username" key="username" attrs="" widget="text"/>
    <field id="uuid-904B5ED2-9CB9-11F0-8EED-16B4455C7DD5" display="Password" attrs="" key="password" name="password" widget="password"/>
    <field display="Login" id="uuid-904BAE8C-9CB9-11F0-8EED-16B4455C7DD5" value="" key="submit" name="submit" attrs="" widget="submit"/>
  </form>
</response>