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="78ED15F4-6853-11F0-8F0B-A10A4E8DD072" method="post" uri="" key="login">
    <field name="username" key="username" id="uuid-78ED4740-6853-11F0-8F0B-A10A4E8DD072" value="" widget="text" display="Username" attrs=""/>
    <field key="password" id="uuid-78ED8F52-6853-11F0-8F0B-A10A4E8DD072" name="password" display="Password" attrs="" widget="password"/>
    <field id="uuid-78EDD656-6853-11F0-8F0B-A10A4E8DD072" key="submit" name="submit" display="Login" attrs="" value="" widget="submit"/>
  </form>
</response>