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" uuid="ECE19A00-7984-11F1-9E8A-A3B78F49F76F" uri="" encoding="&#x2713;" method="post">
    <field attrs="" name="username" widget="text" id="uuid-ECE1CEEE-7984-11F1-9E8A-A3B78F49F76F" display="Username" key="username" value=""/>
    <field key="password" display="Password" id="uuid-ECE2146C-7984-11F1-9E8A-A3B78F49F76F" widget="password" name="password" attrs=""/>
    <field attrs="" name="submit" widget="submit" id="uuid-ECE261CE-7984-11F1-9E8A-A3B78F49F76F" display="Login" key="submit" value=""/>
  </form>
</response>