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="212167FE-6E3C-11F1-9683-E0061BBD9EFC" key="login" encoding="&#x2713;" uri="" method="post">
    <field widget="text" name="username" key="username" id="uuid-21219986-6E3C-11F1-9683-E0061BBD9EFC" display="Username" value="" attrs=""/>
    <field widget="password" attrs="" display="Password" key="password" id="uuid-2121E3A0-6E3C-11F1-9683-E0061BBD9EFC" name="password"/>
    <field value="" attrs="" display="Login" id="uuid-21222CD4-6E3C-11F1-9683-E0061BBD9EFC" name="submit" key="submit" widget="submit"/>
  </form>
</response>