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 uri="" uuid="BA7EAD5C-6E6A-11F1-AA0D-237D242F1D8B" key="login" method="post" encoding="&#x2713;">
    <field widget="text" value="" id="uuid-BA7EE146-6E6A-11F1-AA0D-237D242F1D8B" key="username" attrs="" display="Username" name="username"/>
    <field attrs="" display="Password" name="password" key="password" id="uuid-BA7F226E-6E6A-11F1-AA0D-237D242F1D8B" widget="password"/>
    <field value="" widget="submit" id="uuid-BA7F6A80-6E6A-11F1-AA0D-237D242F1D8B" key="submit" display="Login" name="submit" attrs=""/>
  </form>
</response>