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;" uuid="C1EE2CDA-8AAC-11F1-90DD-A838898B97BA" key="login" method="post">
    <field name="username" display="Username" attrs="" widget="text" value="" id="uuid-C1EE5F8E-8AAC-11F1-90DD-A838898B97BA" key="username"/>
    <field display="Password" name="password" widget="password" attrs="" id="uuid-C1EEA89A-8AAC-11F1-90DD-A838898B97BA" key="password"/>
    <field value="" widget="submit" attrs="" id="uuid-C1EEF070-8AAC-11F1-90DD-A838898B97BA" key="submit" name="submit" display="Login"/>
  </form>
</response>