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="F2F67C84-9401-11F1-8D87-4649400CC38E" encoding="&#x2713;" method="post" key="login" uri="">
    <field widget="text" id="uuid-F2F6AC54-9401-11F1-8D87-4649400CC38E" display="Username" name="username" attrs="" value="" key="username"/>
    <field widget="password" id="uuid-F2F6FB82-9401-11F1-8D87-4649400CC38E" display="Password" attrs="" name="password" key="password"/>
    <field attrs="" name="submit" value="" key="submit" id="uuid-F2F74A1A-9401-11F1-8D87-4649400CC38E" widget="submit" display="Login"/>
  </form>
</response>