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 encoding="&#x2713;" method="post" key="login" uuid="68671A1E-9D7C-11F0-8670-CFEA54FD9ABD" uri="">
    <field value="" attrs="" display="Username" widget="text" id="uuid-68674D72-9D7C-11F0-8670-CFEA54FD9ABD" key="username" name="username"/>
    <field display="Password" attrs="" name="password" widget="password" id="uuid-68679552-9D7C-11F0-8670-CFEA54FD9ABD" key="password"/>
    <field attrs="" value="" display="Login" id="uuid-6867E020-9D7C-11F0-8670-CFEA54FD9ABD" key="submit" widget="submit" name="submit"/>
  </form>
</response>