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="" uuid="4CC9736C-4842-11F1-BB6A-C6868F49F76F" encoding="&#x2713;" method="post" key="login">
    <field key="username" display="Username" attrs="" widget="text" value="" name="username" id="uuid-4CC9A2CE-4842-11F1-BB6A-C6868F49F76F"/>
    <field display="Password" attrs="" key="password" name="password" id="uuid-4CC9E676-4842-11F1-BB6A-C6868F49F76F" widget="password"/>
    <field attrs="" display="Login" key="submit" id="uuid-4CCA2988-4842-11F1-BB6A-C6868F49F76F" name="submit" value="" widget="submit"/>
  </form>
</response>