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;" method="post" key="login" uuid="12E00A98-9E2A-11F0-8456-CBBE455C7DD5" uri="">
    <field display="Username" name="username" widget="text" id="uuid-12E03E1E-9E2A-11F0-8456-CBBE455C7DD5" attrs="" key="username" value=""/>
    <field id="uuid-12E08752-9E2A-11F0-8456-CBBE455C7DD5" widget="password" key="password" attrs="" display="Password" name="password"/>
    <field display="Login" name="submit" widget="submit" id="uuid-12E0CF00-9E2A-11F0-8456-CBBE455C7DD5" key="submit" attrs="" value=""/>
  </form>
</response>