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 method="post" uuid="B8492690-48B6-11F1-9FC8-79481BBD9EFC" key="login" encoding="&#x2713;" uri="">
    <field name="username" display="Username" key="username" widget="text" value="" id="uuid-B8495DA4-48B6-11F1-9FC8-79481BBD9EFC" attrs=""/>
    <field attrs="" id="uuid-B849A322-48B6-11F1-9FC8-79481BBD9EFC" widget="password" key="password" display="Password" name="password"/>
    <field name="submit" display="Login" key="submit" id="uuid-B84A71A8-48B6-11F1-9FC8-79481BBD9EFC" value="" widget="submit" attrs=""/>
  </form>
</response>