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="21A3B262-25B3-11F1-8095-06860C0019C7" encoding="&#x2713;" key="login" method="post" uri="">
    <field value="" id="uuid-21A3E2C8-25B3-11F1-8095-06860C0019C7" widget="text" key="username" attrs="" name="username" display="Username"/>
    <field attrs="" name="password" display="Password" id="uuid-21A42CD8-25B3-11F1-8095-06860C0019C7" widget="password" key="password"/>
    <field id="uuid-21A476D4-25B3-11F1-8095-06860C0019C7" value="" key="submit" widget="submit" name="submit" attrs="" display="Login"/>
  </form>
</response>