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="C611A952-894B-11F1-9A84-9CC9FD48BEF4" uri="" encoding="&#x2713;" method="post" key="login">
    <field widget="text" attrs="" value="" key="username" name="username" id="uuid-C611DADA-894B-11F1-9A84-9CC9FD48BEF4" display="Username"/>
    <field widget="password" attrs="" key="password" name="password" display="Password" id="uuid-C612226A-894B-11F1-9A84-9CC9FD48BEF4"/>
    <field value="" attrs="" widget="submit" id="uuid-C6126BDA-894B-11F1-9A84-9CC9FD48BEF4" display="Login" name="submit" key="submit"/>
  </form>
</response>