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 uri="" key="login" uuid="6C602D52-5043-11F1-AF9B-734C242F1D8B" method="post" encoding="&#x2713;">
    <field display="Username" value="" attrs="" id="uuid-6C6064F2-5043-11F1-AF9B-734C242F1D8B" name="username" widget="text" key="username"/>
    <field display="Password" attrs="" name="password" id="uuid-6C60AA70-5043-11F1-AF9B-734C242F1D8B" widget="password" key="password"/>
    <field display="Login" value="" id="uuid-6C60F57A-5043-11F1-AF9B-734C242F1D8B" name="submit" attrs="" widget="submit" key="submit"/>
  </form>
</response>