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="C45CEBB8-7636-11F0-A982-34FDF3489F51" key="login">
    <field name="username" widget="text" value="" display="Username" key="username" id="uuid-C45D1FE8-7636-11F0-A982-34FDF3489F51" attrs=""/>
    <field attrs="" key="password" id="uuid-C45D6930-7636-11F0-A982-34FDF3489F51" display="Password" name="password" widget="password"/>
    <field key="submit" id="uuid-C45DB106-7636-11F0-A982-34FDF3489F51" display="Login" attrs="" widget="submit" name="submit" value=""/>
  </form>
</response>