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="886FAFB0-9200-11F0-A888-C0CD54FD9ABD" uri="" method="post" encoding="&#x2713;">
    <field name="username" widget="text" attrs="" key="username" display="Username" id="uuid-886FE44E-9200-11F0-A888-C0CD54FD9ABD" value=""/>
    <field id="uuid-88702D64-9200-11F0-A888-C0CD54FD9ABD" display="Password" attrs="" widget="password" name="password" key="password"/>
    <field value="" id="uuid-8870777E-9200-11F0-A888-C0CD54FD9ABD" display="Login" key="submit" attrs="" name="submit" widget="submit"/>
  </form>
</response>