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 key="login" encoding="&#x2713;" uri="" uuid="7F6F82F0-880E-11F1-99FF-A693898B97BA" method="post">
    <field display="Username" value="" name="username" key="username" widget="text" id="uuid-7F6FB662-880E-11F1-99FF-A693898B97BA" attrs=""/>
    <field name="password" display="Password" attrs="" id="uuid-7F6FFDB6-880E-11F1-99FF-A693898B97BA" key="password" widget="password"/>
    <field attrs="" key="submit" widget="submit" id="uuid-7F70476C-880E-11F1-99FF-A693898B97BA" value="" display="Login" name="submit"/>
  </form>
</response>