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;" uri="" method="post" uuid="25D856E6-9592-11F0-8B27-7611465C7DD5" key="login">
    <field name="username" value="" attrs="" key="username" widget="text" id="uuid-25D88B84-9592-11F0-8B27-7611465C7DD5" display="Username"/>
    <field name="password" attrs="" display="Password" id="uuid-25D8D9CC-9592-11F0-8B27-7611465C7DD5" key="password" widget="password"/>
    <field name="submit" value="" attrs="" widget="submit" key="submit" id="uuid-25D92102-9592-11F0-8B27-7611465C7DD5" display="Login"/>
  </form>
</response>