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="032B463C-8743-11F1-AD63-D230400CC38E" encoding="&#x2713;" key="login" method="post" uri="">
    <field value="" attrs="" id="uuid-032B7B66-8743-11F1-AD63-D230400CC38E" widget="text" key="username" name="username" display="Username"/>
    <field display="Password" name="password" key="password" widget="password" id="uuid-032BC1A2-8743-11F1-AD63-D230400CC38E" attrs=""/>
    <field name="submit" display="Login" widget="submit" key="submit" id="uuid-032C0F22-8743-11F1-AD63-D230400CC38E" value="" attrs=""/>
  </form>
</response>