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" key="login" encoding="&#x2713;" uuid="43466814-7A3C-11F1-9312-171D242F1D8B" uri="">
    <field name="username" key="username" id="uuid-43469D52-7A3C-11F1-9312-171D242F1D8B" display="Username" attrs="" value="" widget="text"/>
    <field display="Password" id="uuid-4346E456-7A3C-11F1-9312-171D242F1D8B" key="password" name="password" widget="password" attrs=""/>
    <field display="Login" id="uuid-43472DC6-7A3C-11F1-9312-171D242F1D8B" key="submit" name="submit" value="" widget="submit" attrs=""/>
  </form>
</response>