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" key="login" uuid="4A417F38-6C81-11F0-ABCD-5EDAF3489F51" encoding="&#x2713;" uri="">
    <field display="Username" value="" id="uuid-4A41B0DE-6C81-11F0-ABCD-5EDAF3489F51" attrs="" name="username" key="username" widget="text"/>
    <field display="Password" id="uuid-4A41F6F2-6C81-11F0-ABCD-5EDAF3489F51" name="password" attrs="" widget="password" key="password"/>
    <field attrs="" name="submit" key="submit" widget="submit" display="Login" value="" id="uuid-4A424080-6C81-11F0-ABCD-5EDAF3489F51"/>
  </form>
</response>