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="C3137086-4C66-11F1-98C4-9AB1F8248A5F" encoding="&#x2713;" method="post">
    <field widget="text" key="username" display="Username" attrs="" name="username" id="uuid-C3139FF2-4C66-11F1-98C4-9AB1F8248A5F" value=""/>
    <field id="uuid-C313EBF6-4C66-11F1-98C4-9AB1F8248A5F" attrs="" name="password" display="Password" key="password" widget="password"/>
    <field id="uuid-C3143354-4C66-11F1-98C4-9AB1F8248A5F" value="" widget="submit" attrs="" name="submit" display="Login" key="submit"/>
  </form>
</response>