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" uuid="7803E670-3843-11F1-886C-9BE70C0019C7" uri="" key="login" encoding="&#x2713;">
    <field attrs="" widget="text" name="username" key="username" id="uuid-78041A5A-3843-11F1-886C-9BE70C0019C7" display="Username" value=""/>
    <field key="password" name="password" display="Password" id="uuid-7804629E-3843-11F1-886C-9BE70C0019C7" widget="password" attrs=""/>
    <field key="submit" name="submit" value="" display="Login" id="uuid-7804ACEA-3843-11F1-886C-9BE70C0019C7" widget="submit" attrs=""/>
  </form>
</response>