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="6879FDA6-31D2-11F1-B628-E488A9425785" method="post" uri="" encoding="&#x2713;" key="login">
    <field name="username" id="uuid-687A3406-31D2-11F1-B628-E488A9425785" value="" widget="text" key="username" attrs="" display="Username"/>
    <field id="uuid-687A7A4C-31D2-11F1-B628-E488A9425785" name="password" display="Password" attrs="" key="password" widget="password"/>
    <field value="" id="uuid-687AC7AE-31D2-11F1-B628-E488A9425785" name="submit" display="Login" attrs="" key="submit" widget="submit"/>
  </form>
</response>