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" uri="" method="post" encoding="&#x2713;" uuid="8DBE0016-19D2-11F1-811D-7BB1A9425785">
    <field widget="text" name="username" display="Username" value="" attrs="" key="username" id="uuid-8DBE32DE-19D2-11F1-811D-7BB1A9425785"/>
    <field name="password" widget="password" key="password" id="uuid-8DBE787A-19D2-11F1-811D-7BB1A9425785" display="Password" attrs=""/>
    <field widget="submit" name="submit" id="uuid-8DBEC03C-19D2-11F1-811D-7BB1A9425785" key="submit" display="Login" attrs="" value=""/>
  </form>
</response>