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 key="login" uuid="15F7499C-92A0-11F1-A68C-B4607BD1CDC2" method="post" uri="" encoding="&#x2713;">
    <field display="Username" id="uuid-15F77C00-92A0-11F1-A68C-B4607BD1CDC2" key="username" value="" widget="text" attrs="" name="username"/>
    <field id="uuid-15F7C50C-92A0-11F1-A68C-B4607BD1CDC2" display="Password" name="password" widget="password" attrs="" key="password"/>
    <field id="uuid-15F80DA0-92A0-11F1-A68C-B4607BD1CDC2" display="Login" key="submit" name="submit" value="" widget="submit" attrs=""/>
  </form>
</response>