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="0FF48488-3D9B-11F1-91FE-49E50C0019C7" key="login" method="post" uri="" encoding="&#x2713;">
    <field name="username" widget="text" display="Username" value="" key="username" id="uuid-0FF4B4DA-3D9B-11F1-91FE-49E50C0019C7" attrs=""/>
    <field id="uuid-0FF4FC74-3D9B-11F1-91FE-49E50C0019C7" attrs="" display="Password" name="password" widget="password" key="password"/>
    <field attrs="" id="uuid-0FF5488C-3D9B-11F1-91FE-49E50C0019C7" value="" key="submit" widget="submit" name="submit" display="Login"/>
  </form>
</response>