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="1171F6EC-9340-11F1-827F-4B14F6CBB814" key="login" uri="" method="post">
    <field value="" attrs="" display="Username" widget="text" name="username" id="uuid-11722D10-9340-11F1-827F-4B14F6CBB814" key="username"/>
    <field id="uuid-117275F4-9340-11F1-827F-4B14F6CBB814" name="password" key="password" widget="password" display="Password" attrs=""/>
    <field value="" attrs="" widget="submit" display="Login" name="submit" key="submit" id="uuid-1172C39C-9340-11F1-827F-4B14F6CBB814"/>
  </form>
</response>