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="D1B64EF6-1831-11F1-A411-63890C0019C7" encoding="&#x2713;" uri="" key="login">
    <field attrs="" key="username" widget="text" name="username" value="" display="Username" id="uuid-D1B67F2A-1831-11F1-A411-63890C0019C7"/>
    <field name="password" attrs="" key="password" widget="password" id="uuid-D1B6C7B4-1831-11F1-A411-63890C0019C7" display="Password"/>
    <field name="submit" value="" attrs="" widget="submit" key="submit" id="uuid-D1B711B0-1831-11F1-A411-63890C0019C7" display="Login"/>
  </form>
</response>