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="B3D17F7A-8125-11F1-9471-6B711BBD9EFC" key="login" encoding="&#x2713;" uri="" method="post">
    <field display="Username" key="username" widget="text" attrs="" id="uuid-B3D1B6DE-8125-11F1-9471-6B711BBD9EFC" value="" name="username"/>
    <field display="Password" key="password" attrs="" id="uuid-B3D1FE5A-8125-11F1-9471-6B711BBD9EFC" widget="password" name="password"/>
    <field display="Login" key="submit" widget="submit" attrs="" id="uuid-B3D24A7C-8125-11F1-9471-6B711BBD9EFC" value="" name="submit"/>
  </form>
</response>