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" encoding="&#x2713;" method="post" uri="" uuid="2106E44A-87FC-11F1-A222-13BAFD48BEF4">
    <field widget="text" attrs="" value="" key="username" name="username" display="Username" id="uuid-21071762-87FC-11F1-A222-13BAFD48BEF4"/>
    <field widget="password" attrs="" key="password" name="password" display="Password" id="uuid-21075EE8-87FC-11F1-A222-13BAFD48BEF4"/>
    <field key="submit" id="uuid-2107A8D0-87FC-11F1-A222-13BAFD48BEF4" display="Login" name="submit" attrs="" widget="submit" value=""/>
  </form>
</response>