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" uuid="5880B93C-754C-11F0-A8CD-72D2ED0FA296" method="post" encoding="&#x2713;" uri="">
    <field widget="text" value="" key="username" id="uuid-5880F08C-754C-11F0-A8CD-72D2ED0FA296" attrs="" name="username" display="Username"/>
    <field display="Password" attrs="" name="password" widget="password" id="uuid-58813F9C-754C-11F0-A8CD-72D2ED0FA296" key="password"/>
    <field attrs="" name="submit" display="Login" key="submit" id="uuid-58818FE2-754C-11F0-A8CD-72D2ED0FA296" widget="submit" value=""/>
  </form>
</response>