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="A5E6DCE4-4C9A-11F1-AFF1-FDB18F49F76F" encoding="&#x2713;" method="post" key="login">
    <field display="Username" attrs="" value="" id="uuid-A5E70E62-4C9A-11F1-AFF1-FDB18F49F76F" key="username" widget="text" name="username"/>
    <field key="password" name="password" widget="password" id="uuid-A5E75534-4C9A-11F1-AFF1-FDB18F49F76F" attrs="" display="Password"/>
    <field id="uuid-A5E79FBC-4C9A-11F1-AFF1-FDB18F49F76F" attrs="" display="Login" value="" key="submit" name="submit" widget="submit"/>
  </form>
</response>