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" encoding="&#x2713;" key="login" uuid="D421D312-705C-11F1-82E0-4D331BBD9EFC" uri="">
    <field attrs="" id="uuid-D4220756-705C-11F1-82E0-4D331BBD9EFC" value="" display="Username" name="username" widget="text" key="username"/>
    <field widget="password" key="password" attrs="" id="uuid-D4224E50-705C-11F1-82E0-4D331BBD9EFC" display="Password" name="password"/>
    <field display="Login" name="submit" value="" id="uuid-D4229AEA-705C-11F1-82E0-4D331BBD9EFC" attrs="" key="submit" widget="submit"/>
  </form>
</response>