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;" key="login" uri="" uuid="9AD100A6-90C4-11F0-8711-45D6455C7DD5" method="post">
    <field value="" key="username" display="Username" id="uuid-9AD134CC-90C4-11F0-8711-45D6455C7DD5" widget="text" attrs="" name="username"/>
    <field attrs="" name="password" widget="password" display="Password" id="uuid-9AD17A72-90C4-11F0-8711-45D6455C7DD5" key="password"/>
    <field attrs="" name="submit" widget="submit" id="uuid-9AD1C1DA-90C4-11F0-8711-45D6455C7DD5" display="Login" key="submit" value=""/>
  </form>
</response>