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 method="post" encoding="&#x2713;" uuid="CD7D270E-75F4-11F0-A4CC-50F2F3489F51" key="login" uri="">
    <field attrs="" display="Username" id="uuid-CD7D5882-75F4-11F0-A4CC-50F2F3489F51" key="username" value="" name="username" widget="text"/>
    <field widget="password" name="password" attrs="" display="Password" key="password" id="uuid-CD7D9FD6-75F4-11F0-A4CC-50F2F3489F51"/>
    <field attrs="" display="Login" id="uuid-CD7DE73E-75F4-11F0-A4CC-50F2F3489F51" key="submit" value="" name="submit" widget="submit"/>
  </form>
</response>