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" uuid="16A7FF48-8F18-11F1-8C97-163E400CC38E" uri="" encoding="&#x2713;" method="post">
    <field name="username" display="Username" attrs="" widget="text" id="uuid-16A83148-8F18-11F1-8C97-163E400CC38E" key="username" value=""/>
    <field name="password" display="Password" attrs="" widget="password" id="uuid-16A877CA-8F18-11F1-8C97-163E400CC38E" key="password"/>
    <field value="" widget="submit" id="uuid-16A8C1DA-8F18-11F1-8C97-163E400CC38E" key="submit" display="Login" name="submit" attrs=""/>
  </form>
</response>