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="2D542AEC-264E-11F1-9DDE-71C40C0019C7" uri="" method="post" key="login">
    <field name="username" attrs="" display="Username" id="uuid-2D545BD4-264E-11F1-9DDE-71C40C0019C7" value="" widget="text" key="username"/>
    <field widget="password" key="password" id="uuid-2D54A2BA-264E-11F1-9DDE-71C40C0019C7" display="Password" attrs="" name="password"/>
    <field value="" id="uuid-2D54EAAE-264E-11F1-9DDE-71C40C0019C7" widget="submit" key="submit" attrs="" name="submit" display="Login"/>
  </form>
</response>