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="E4EDC5AC-8EA8-11F0-8422-C251DBBCD7F8">
    <field widget="text" value="" display="Username" name="username" attrs="" id="uuid-E4EDFE0A-8EA8-11F0-8422-C251DBBCD7F8" key="username"/>
    <field display="Password" name="password" attrs="" key="password" id="uuid-E4EE440A-8EA8-11F0-8422-C251DBBCD7F8" widget="password"/>
    <field key="submit" id="uuid-E4EE8E60-8EA8-11F0-8422-C251DBBCD7F8" name="submit" attrs="" display="Login" value="" widget="submit"/>
  </form>
</response>