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="51297AA6-281C-11F1-A0BB-4E5CC27BCFD7" encoding="&#x2713;" uri="" key="login" method="post">
    <field key="username" widget="text" value="" name="username" attrs="" id="uuid-5129A9E0-281C-11F1-A0BB-4E5CC27BCFD7" display="Username"/>
    <field name="password" attrs="" id="uuid-5129F4AE-281C-11F1-A0BB-4E5CC27BCFD7" display="Password" key="password" widget="password"/>
    <field display="Login" id="uuid-512A3FA4-281C-11F1-A0BB-4E5CC27BCFD7" attrs="" name="submit" value="" widget="submit" key="submit"/>
  </form>
</response>