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 method="post" encoding="&#x2713;" uri="" uuid="F74FD75E-3AB9-11F1-BA57-29C3A9425785" key="login">
    <field id="uuid-F750076A-3AB9-11F1-BA57-29C3A9425785" key="username" widget="text" name="username" value="" attrs="" display="Username"/>
    <field id="uuid-F7504F7C-3AB9-11F1-BA57-29C3A9425785" key="password" widget="password" name="password" attrs="" display="Password"/>
    <field id="uuid-F750990A-3AB9-11F1-BA57-29C3A9425785" widget="submit" key="submit" attrs="" display="Login" value="" name="submit"/>
  </form>
</response>