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="9697DF84-8F95-11F1-9577-957F400CC38E" encoding="&#x2713;" uri="" method="post">
    <field value="" key="username" id="uuid-96981440-8F95-11F1-9577-957F400CC38E" widget="text" attrs="" display="Username" name="username"/>
    <field name="password" display="Password" attrs="" widget="password" key="password" id="uuid-96985C0C-8F95-11F1-9577-957F400CC38E"/>
    <field attrs="" name="submit" display="Login" id="uuid-9698A4AA-8F95-11F1-9577-957F400CC38E" key="submit" widget="submit" value=""/>
  </form>
</response>