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" method="post" encoding="&#x2713;" uri="" uuid="8F7414AC-78AC-11F1-A71B-39F825D43659">
    <field widget="text" id="uuid-8F74468E-78AC-11F1-A71B-39F825D43659" name="username" value="" display="Username" key="username" attrs=""/>
    <field attrs="" key="password" display="Password" name="password" widget="password" id="uuid-8F749314-78AC-11F1-A71B-39F825D43659"/>
    <field attrs="" display="Login" key="submit" value="" widget="submit" id="uuid-8F74E0DA-78AC-11F1-A71B-39F825D43659" name="submit"/>
  </form>
</response>