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 encoding="&#x2713;" uuid="62E02562-8FB7-11F1-AA8D-C4387BD1CDC2" method="post" uri="" key="login">
    <field name="username" value="" display="Username" id="uuid-62E04A10-8FB7-11F1-AA8D-C4387BD1CDC2" key="username" attrs="" widget="text"/>
    <field name="password" display="Password" id="uuid-62E06E0A-8FB7-11F1-AA8D-C4387BD1CDC2" attrs="" widget="password" key="password"/>
    <field attrs="" widget="submit" key="submit" id="uuid-62E08DB8-8FB7-11F1-AA8D-C4387BD1CDC2" display="Login" value="" name="submit"/>
  </form>
</response>