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="A431553E-F383-11F0-8A02-38A62597109C" method="post" key="login" encoding="&#x2713;" uri="">
    <field name="username" display="Username" attrs="" value="" key="username" widget="text" id="uuid-A4318B08-F383-11F0-8A02-38A62597109C"/>
    <field name="password" display="Password" attrs="" key="password" widget="password" id="uuid-A431D4FA-F383-11F0-8A02-38A62597109C"/>
    <field attrs="" display="Login" name="submit" id="uuid-A4321F64-F383-11F0-8A02-38A62597109C" widget="submit" key="submit" value=""/>
  </form>
</response>