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="66B336EA-784A-11F1-A312-C75F242F1D8B" method="post" uri="" key="login" encoding="&#x2713;">
    <field value="" id="uuid-66B36AB6-784A-11F1-A312-C75F242F1D8B" display="Username" key="username" attrs="" name="username" widget="text"/>
    <field widget="password" name="password" key="password" attrs="" display="Password" id="uuid-66B3B124-784A-11F1-A312-C75F242F1D8B"/>
    <field id="uuid-66B3F986-784A-11F1-A312-C75F242F1D8B" value="" display="Login" key="submit" attrs="" name="submit" widget="submit"/>
  </form>
</response>