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 uri="" uuid="54107676-8E88-11F0-9FD6-9FFE455C7DD5" encoding="&#x2713;" method="post" key="login">
    <field value="" id="uuid-5410AB96-8E88-11F0-9FD6-9FFE455C7DD5" key="username" name="username" display="Username" widget="text" attrs=""/>
    <field key="password" id="uuid-5410F178-8E88-11F0-9FD6-9FFE455C7DD5" widget="password" attrs="" display="Password" name="password"/>
    <field id="uuid-54113A16-8E88-11F0-9FD6-9FFE455C7DD5" key="submit" value="" widget="submit" attrs="" display="Login" name="submit"/>
  </form>
</response>