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" encoding="&#x2713;" uuid="E1E103C4-4357-11F1-BE0D-783C1ABF1312" uri="" method="post">
    <field widget="text" value="" display="Username" id="uuid-E1E17462-4357-11F1-ABE2-783C1ABF1312" name="username" attrs="" key="username"/>
    <field display="Password" id="uuid-E1E1A1F8-4357-11F1-ABE2-783C1ABF1312" attrs="" name="password" key="password" widget="password"/>
    <field widget="submit" value="" attrs="" name="submit" id="uuid-E1E1E974-4357-11F1-ABE2-783C1ABF1312" display="Login" key="submit"/>
  </form>
</response>