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="BFD40F60-22B9-11F1-8868-E0EE0C0019C7" encoding="&#x2713;" uri="" key="login">
    <field attrs="" display="Username" name="username" widget="text" value="" key="username" id="uuid-BFD443D6-22B9-11F1-8868-E0EE0C0019C7"/>
    <field attrs="" name="password" display="Password" widget="password" id="uuid-BFD48DD2-22B9-11F1-8868-E0EE0C0019C7" key="password"/>
    <field id="uuid-BFD4D814-22B9-11F1-8868-E0EE0C0019C7" key="submit" widget="submit" value="" display="Login" name="submit" attrs=""/>
  </form>
</response>