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="ED811F6A-3C50-11F1-9131-451F1ABF1312" method="post" encoding="&#x2713;" uri="" key="login">
    <field attrs="" key="username" widget="text" id="uuid-ED817F00-3C50-11F1-9131-451F1ABF1312" value="" display="Username" name="username"/>
    <field name="password" display="Password" key="password" attrs="" widget="password" id="uuid-ED81C730-3C50-11F1-9131-451F1ABF1312"/>
    <field value="" key="submit" attrs="" widget="submit" id="uuid-ED821118-3C50-11F1-9131-451F1ABF1312" name="submit" display="Login"/>
  </form>
</response>