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 uuid="4CBD0AA2-1999-11EA-BBDA-6E1A4A0E2E26" encoding="&#x2713;" uri="" key="login" method="post">
    <field widget="text" name="username" display="Username" id="uuid-4CBD3E5A-1999-11EA-BBDA-6E1A4A0E2E26" value="" key="username" attrs=""/>
    <field name="password" widget="password" attrs="" key="password" id="uuid-4CBD76E0-1999-11EA-BBDA-6E1A4A0E2E26" display="Password"/>
    <field name="submit" widget="submit" attrs="" key="submit" id="uuid-4CBDB9FC-1999-11EA-BBDA-6E1A4A0E2E26" value="" display="Login"/>
  </form>
</response>