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" uuid="618D51E0-CD9B-11F1-BF19-F0CA49691810" encoding="&#x2713;" uri="">
    <field attrs="" value="" name="username" widget="text" id="uuid-618D8278-CD9B-11F1-BF19-F0CA49691810" key="username" display="Username"/>
    <field name="password" attrs="" key="password" id="uuid-618DCC74-CD9B-11F1-BF19-F0CA49691810" display="Password" widget="password"/>
    <field value="" name="submit" attrs="" key="submit" id="uuid-618E1B0C-CD9B-11F1-BF19-F0CA49691810" display="Login" widget="submit"/>
  </form>
</response>