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 uri="" key="login" uuid="565FA63E-310F-11F1-91B1-6E821ABF1312" method="post" encoding="&#x2713;">
    <field widget="text" value="" display="Username" id="uuid-565FD960-310F-11F1-91B1-6E821ABF1312" key="username" attrs="" name="username"/>
    <field name="password" attrs="" key="password" id="uuid-56601F42-310F-11F1-91B1-6E821ABF1312" display="Password" widget="password"/>
    <field value="" display="Login" widget="submit" id="uuid-56606AC4-310F-11F1-91B1-6E821ABF1312" attrs="" key="submit" name="submit"/>
  </form>
</response>