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="6EBD361A-2FAC-11F1-AB09-18B8A9425785" method="post" uri="" encoding="&#x2713;">
    <field widget="text" name="username" id="uuid-6EBD6C02-2FAC-11F1-AB09-18B8A9425785" display="Username" value="" attrs="" key="username"/>
    <field display="Password" id="uuid-6EBDB4D2-2FAC-11F1-AB09-18B8A9425785" attrs="" key="password" name="password" widget="password"/>
    <field name="submit" widget="submit" attrs="" id="uuid-6EBDFDA2-2FAC-11F1-AB09-18B8A9425785" display="Login" value="" key="submit"/>
  </form>
</response>