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 uri="" encoding="&#x2713;" key="login" uuid="86767ED8-C8A4-11F1-A9E6-1C4C2C684F3D" method="post">
    <field value="" key="username" name="username" display="Username" id="uuid-8676ADF4-C8A4-11F1-A9E6-1C4C2C684F3D" attrs="" widget="text"/>
    <field name="password" id="uuid-8676E472-C8A4-11F1-A9E6-1C4C2C684F3D" display="Password" attrs="" widget="password" key="password"/>
    <field key="submit" value="" widget="submit" attrs="" display="Login" id="uuid-86772432-C8A4-11F1-A9E6-1C4C2C684F3D" name="submit"/>
  </form>
</response>