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="56D35B08-67F9-11F1-838B-911B1BBD9EFC" key="login" encoding="&#x2713;" uri="" method="post">
    <field widget="text" display="Username" attrs="" value="" id="uuid-56D39032-67F9-11F1-838B-911B1BBD9EFC" name="username" key="username"/>
    <field display="Password" attrs="" key="password" id="uuid-56D3D736-67F9-11F1-838B-911B1BBD9EFC" name="password" widget="password"/>
    <field value="" attrs="" display="Login" name="submit" id="uuid-56D42362-67F9-11F1-838B-911B1BBD9EFC" key="submit" widget="submit"/>
  </form>
</response>