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="F6CD3518-6CB1-11F1-95BE-7F64242F1D8B" encoding="&#x2713;" key="login" uri="" method="post">
    <field key="username" name="username" id="uuid-F6CD6934-6CB1-11F1-95BE-7F64242F1D8B" widget="text" value="" attrs="" display="Username"/>
    <field name="password" key="password" widget="password" id="uuid-F6CDAF0C-6CB1-11F1-95BE-7F64242F1D8B" attrs="" display="Password"/>
    <field key="submit" name="submit" id="uuid-F6CDFA16-6CB1-11F1-95BE-7F64242F1D8B" widget="submit" value="" display="Login" attrs=""/>
  </form>
</response>