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="" uuid="028C3110-73D3-11F1-BE86-67111BBD9EFC" method="post">
    <field value="" widget="text" key="username" name="username" display="Username" attrs="" id="uuid-028C6946-73D3-11F1-BE86-67111BBD9EFC"/>
    <field attrs="" id="uuid-028CBA72-73D3-11F1-BE86-67111BBD9EFC" widget="password" key="password" display="Password" name="password"/>
    <field value="" key="submit" widget="submit" name="submit" display="Login" attrs="" id="uuid-028D090A-73D3-11F1-BE86-67111BBD9EFC"/>
  </form>
</response>