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="" key="login" uuid="EA38E532-C69C-11F1-A0DF-F3C4FD48BEF4" encoding="&#x2713;" method="post">
    <field attrs="" widget="text" id="uuid-EA3917F0-C69C-11F1-A0DF-F3C4FD48BEF4" name="username" display="Username" value="" key="username"/>
    <field id="uuid-EA3960D4-C69C-11F1-A0DF-F3C4FD48BEF4" widget="password" attrs="" key="password" display="Password" name="password"/>
    <field display="Login" name="submit" value="" key="submit" attrs="" widget="submit" id="uuid-EA39AB70-C69C-11F1-A0DF-F3C4FD48BEF4"/>
  </form>
</response>