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 uri="" key="login" encoding="&#x2713;" uuid="4EA66CF6-3F61-11F1-8078-B31C802D798A" method="post">
    <field name="username" key="username" display="Username" id="uuid-4EA6A89C-3F61-11F1-8078-B31C802D798A" value="" attrs="" widget="text"/>
    <field key="password" display="Password" name="password" id="uuid-4EA6F770-3F61-11F1-8078-B31C802D798A" attrs="" widget="password"/>
    <field attrs="" widget="submit" id="uuid-4EA74A54-3F61-11F1-8078-B31C802D798A" value="" display="Login" key="submit" name="submit"/>
  </form>
</response>