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="EA23F13C-8145-11F1-83E9-4721242F1D8B" uri="" method="post" encoding="&#x2713;" key="login">
    <field attrs="" value="" widget="text" display="Username" id="uuid-EA243250-8145-11F1-83E9-4721242F1D8B" key="username" name="username"/>
    <field widget="password" display="Password" id="uuid-EA248192-8145-11F1-83E9-4721242F1D8B" attrs="" name="password" key="password"/>
    <field id="uuid-EA24D728-8145-11F1-83E9-4721242F1D8B" widget="submit" display="Login" value="" attrs="" key="submit" name="submit"/>
  </form>
</response>