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="FDD573A6-8FC6-11F1-A5F6-68CAFD48BEF4" key="login" method="post" uri="" encoding="&#x2713;">
    <field attrs="" key="username" name="username" widget="text" display="Username" id="uuid-FDD5A556-8FC6-11F1-A5F6-68CAFD48BEF4" value=""/>
    <field widget="password" attrs="" name="password" key="password" id="uuid-FDD5EF02-8FC6-11F1-A5F6-68CAFD48BEF4" display="Password"/>
    <field id="uuid-FDD63822-8FC6-11F1-A5F6-68CAFD48BEF4" value="" display="Login" widget="submit" attrs="" name="submit" key="submit"/>
  </form>
</response>