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 encoding="&#x2713;" key="login" uri="" uuid="6D233F2A-7864-11F0-906D-DAD6F3489F51" method="post">
    <field key="username" widget="text" display="Username" attrs="" name="username" value="" id="uuid-6D237878-7864-11F0-906D-DAD6F3489F51"/>
    <field id="uuid-6D23BD4C-7864-11F0-906D-DAD6F3489F51" name="password" display="Password" attrs="" widget="password" key="password"/>
    <field widget="submit" key="submit" value="" id="uuid-6D2407A2-7864-11F0-906D-DAD6F3489F51" name="submit" attrs="" display="Login"/>
  </form>
</response>