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 uuid="5DBA362A-332F-11F1-87C9-E2F70C0019C7" uri="" key="login" encoding="&#x2713;" method="post">
    <field value="" name="username" key="username" display="Username" id="uuid-5DBA6A50-332F-11F1-87C9-E2F70C0019C7" widget="text" attrs=""/>
    <field attrs="" widget="password" id="uuid-5DBAB65E-332F-11F1-87C9-E2F70C0019C7" key="password" display="Password" name="password"/>
    <field name="submit" key="submit" display="Login" id="uuid-5DBB0514-332F-11F1-87C9-E2F70C0019C7" value="" attrs="" widget="submit"/>
  </form>
</response>