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 uuid="6463B8F4-7A81-11F1-9779-BE888F49F76F" key="login" method="post" uri="" encoding="&#x2713;">
    <field name="username" id="uuid-6463E6DA-7A81-11F1-9779-BE888F49F76F" display="Username" widget="text" value="" key="username" attrs=""/>
    <field attrs="" key="password" name="password" id="uuid-64642F28-7A81-11F1-9779-BE888F49F76F" widget="password" display="Password"/>
    <field widget="submit" display="Login" id="uuid-64647A78-7A81-11F1-9779-BE888F49F76F" name="submit" attrs="" value="" key="submit"/>
  </form>
</response>