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" uri="" method="post" encoding="&#x2713;" uuid="D0663DA4-91A3-11F1-8B33-0D5F400CC38E">
    <field display="Username" widget="text" id="uuid-D06673AA-91A3-11F1-8B33-0D5F400CC38E" value="" key="username" attrs="" name="username"/>
    <field display="Password" widget="password" id="uuid-D066C30A-91A3-11F1-8B33-0D5F400CC38E" key="password" attrs="" name="password"/>
    <field name="submit" attrs="" key="submit" value="" id="uuid-D06710A8-91A3-11F1-8B33-0D5F400CC38E" widget="submit" display="Login"/>
  </form>
</response>