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;" uuid="9A3AA10A-88F9-11F1-BBB8-317C400CC38E" uri="" key="login" method="post">
    <field display="Username" name="username" key="username" widget="text" id="uuid-9A3AD79C-88F9-11F1-BBB8-317C400CC38E" attrs="" value=""/>
    <field id="uuid-9A3B2184-88F9-11F1-BBB8-317C400CC38E" attrs="" name="password" display="Password" widget="password" key="password"/>
    <field attrs="" value="" id="uuid-9A3B6BD0-88F9-11F1-BBB8-317C400CC38E" key="submit" widget="submit" display="Login" name="submit"/>
  </form>
</response>