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="AC138304-79C9-11F1-A5D8-05C28F49F76F" uri="" encoding="&#x2713;" key="login" method="post">
    <field key="username" display="Username" value="" attrs="" name="username" id="uuid-AC13B482-79C9-11F1-A5D8-05C28F49F76F" widget="text"/>
    <field display="Password" key="password" name="password" attrs="" widget="password" id="uuid-AC14002C-79C9-11F1-A5D8-05C28F49F76F"/>
    <field value="" display="Login" key="submit" widget="submit" id="uuid-AC1447B2-79C9-11F1-A5D8-05C28F49F76F" attrs="" name="submit"/>
  </form>
</response>