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="3C7CBC30-A2DD-11F1-A14A-57157BD1CDC2" encoding="&#x2713;" key="login" uri="" method="post">
    <field name="username" key="username" display="Username" value="" attrs="" widget="text" id="uuid-3C7CF164-A2DD-11F1-A14A-57157BD1CDC2"/>
    <field id="uuid-3C7D38E0-A2DD-11F1-A14A-57157BD1CDC2" widget="password" attrs="" display="Password" key="password" name="password"/>
    <field id="uuid-3C7D861A-A2DD-11F1-A14A-57157BD1CDC2" widget="submit" attrs="" value="" display="Login" name="submit" key="submit"/>
  </form>
</response>