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="5D95D292-8E03-11F1-92E0-D361400CC38E" encoding="&#x2713;" uri="" key="login">
    <field key="username" id="uuid-5D960CF8-8E03-11F1-92E0-D361400CC38E" widget="text" value="" attrs="" name="username" display="Username"/>
    <field display="Password" name="password" attrs="" widget="password" id="uuid-5D9658FC-8E03-11F1-92E0-D361400CC38E" key="password"/>
    <field attrs="" name="submit" display="Login" key="submit" id="uuid-5D96A848-8E03-11F1-92E0-D361400CC38E" widget="submit" value=""/>
  </form>
</response>