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" uri="" method="post" uuid="7800B918-7F66-11F1-9D61-5EE425D43659" encoding="&#x2713;">
    <field widget="text" id="uuid-7800E80C-7F66-11F1-9D61-5EE425D43659" value="" key="username" name="username" display="Username" attrs=""/>
    <field attrs="" display="Password" name="password" key="password" id="uuid-78012C86-7F66-11F1-9D61-5EE425D43659" widget="password"/>
    <field name="submit" display="Login" attrs="" value="" key="submit" id="uuid-78017466-7F66-11F1-9D61-5EE425D43659" widget="submit"/>
  </form>
</response>