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="1E68A134-93BD-11F1-9019-4432898B97BA" encoding="&#x2713;" key="login" method="post" uri="">
    <field value="" attrs="" display="Username" id="uuid-1E68D488-93BD-11F1-9019-4432898B97BA" key="username" name="username" widget="text"/>
    <field name="password" widget="password" attrs="" display="Password" id="uuid-1E6919A2-93BD-11F1-9019-4432898B97BA" key="password"/>
    <field widget="submit" name="submit" key="submit" attrs="" value="" display="Login" id="uuid-1E6963E4-93BD-11F1-9019-4432898B97BA"/>
  </form>
</response>