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 key="login" encoding="&#x2713;" uri="" method="post" uuid="BFA3E7C4-4012-11F1-BF9D-47DE2597109C">
    <field name="username" key="username" widget="text" value="" display="Username" attrs="" id="uuid-BFA41A0A-4012-11F1-BF9D-47DE2597109C"/>
    <field attrs="" display="Password" id="uuid-BFA45D58-4012-11F1-BF9D-47DE2597109C" key="password" widget="password" name="password"/>
    <field id="uuid-BFA4A54C-4012-11F1-BF9D-47DE2597109C" display="Login" value="" attrs="" name="submit" widget="submit" key="submit"/>
  </form>
</response>