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="7B74811E-4439-11F1-BFAB-159225D43659" method="post" uri="" key="login" encoding="&#x2713;">
    <field display="Username" value="" attrs="" widget="text" key="username" name="username" id="uuid-7B74B9D6-4439-11F1-BFAB-159225D43659"/>
    <field display="Password" attrs="" widget="password" id="uuid-7B74FEDC-4439-11F1-BFAB-159225D43659" name="password" key="password"/>
    <field id="uuid-7B754784-4439-11F1-BFAB-159225D43659" key="submit" name="submit" widget="submit" value="" attrs="" display="Login"/>
  </form>
</response>