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" method="post" encoding="&#x2713;" uri="" uuid="F4E96F1E-9BEC-11F0-B737-40813B611A6C">
    <field key="username" widget="text" id="uuid-F4E9A452-9BEC-11F0-B737-40813B611A6C" display="Username" attrs="" name="username" value=""/>
    <field attrs="" name="password" id="uuid-F4E9E53E-9BEC-11F0-B737-40813B611A6C" display="Password" widget="password" key="password"/>
    <field display="Login" id="uuid-F4EA2AD0-9BEC-11F0-B737-40813B611A6C" widget="submit" key="submit" value="" attrs="" name="submit"/>
  </form>
</response>