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="" method="post" key="login" encoding="&#x2713;" uuid="07A8BBA8-92F7-11F1-9C70-E0DFF5CBB814">
    <field id="uuid-07A8ED6C-92F7-11F1-9C70-E0DFF5CBB814" name="username" key="username" attrs="" widget="text" display="Username" value=""/>
    <field id="uuid-07A93632-92F7-11F1-9C70-E0DFF5CBB814" name="password" key="password" widget="password" display="Password" attrs=""/>
    <field id="uuid-07A9810A-92F7-11F1-9C70-E0DFF5CBB814" key="submit" name="submit" value="" attrs="" widget="submit" display="Login"/>
  </form>
</response>