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 uuid="96E42968-4D71-11F1-A0FE-185C242F1D8B" uri="" method="post" key="login" encoding="&#x2713;">
    <field attrs="" value="" widget="text" display="Username" name="username" id="uuid-96E45DB6-4D71-11F1-A0FE-185C242F1D8B" key="username"/>
    <field attrs="" widget="password" display="Password" name="password" id="uuid-96E4A578-4D71-11F1-A0FE-185C242F1D8B" key="password"/>
    <field attrs="" value="" widget="submit" display="Login" id="uuid-96E4ED9E-4D71-11F1-A0FE-185C242F1D8B" name="submit" key="submit"/>
  </form>
</response>