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" uri="" method="post" uuid="879E04D2-3FF8-11F1-B127-27BAA9425785" encoding="&#x2713;">
    <field value="" id="uuid-879E365A-3FF8-11F1-B127-27BAA9425785" name="username" display="Username" widget="text" attrs="" key="username"/>
    <field widget="password" key="password" attrs="" name="password" id="uuid-879E7B60-3FF8-11F1-B127-27BAA9425785" display="Password"/>
    <field key="submit" attrs="" widget="submit" name="submit" id="uuid-879EC48A-3FF8-11F1-B127-27BAA9425785" value="" display="Login"/>
  </form>
</response>