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 encoding="&#x2713;" uuid="B6CA94B6-2F7A-11F1-AA8F-2B731ABF1312" method="post" key="login" uri="">
    <field key="username" attrs="" name="username" widget="text" display="Username" value="" id="uuid-B6CAC76A-2F7A-11F1-AA8F-2B731ABF1312"/>
    <field id="uuid-B6CB0F7C-2F7A-11F1-AA8F-2B731ABF1312" display="Password" widget="password" name="password" attrs="" key="password"/>
    <field name="submit" attrs="" key="submit" id="uuid-B6CB5630-2F7A-11F1-AA8F-2B731ABF1312" display="Login" value="" widget="submit"/>
  </form>
</response>