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="C8C11BDE-3B9D-11F1-B353-3A9D0C0019C7" method="post" encoding="&#x2713;" uri="" key="login">
    <field widget="text" key="username" value="" name="username" id="uuid-C8C14C4E-3B9D-11F1-B353-3A9D0C0019C7" attrs="" display="Username"/>
    <field attrs="" display="Password" id="uuid-C8C1976C-3B9D-11F1-B353-3A9D0C0019C7" name="password" key="password" widget="password"/>
    <field value="" name="submit" widget="submit" key="submit" display="Login" attrs="" id="uuid-C8C1E2EE-3B9D-11F1-B353-3A9D0C0019C7"/>
  </form>
</response>