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="B253B346-89B0-11F1-A46A-8469FD48BEF4" uri="" encoding="&#x2713;" method="post" key="login">
    <field name="username" display="Username" id="uuid-B253E19A-89B0-11F1-A46A-8469FD48BEF4" key="username" value="" widget="text" attrs=""/>
    <field attrs="" widget="password" id="uuid-B2542C4A-89B0-11F1-A46A-8469FD48BEF4" display="Password" name="password" key="password"/>
    <field attrs="" widget="submit" value="" key="submit" id="uuid-B2547312-89B0-11F1-A46A-8469FD48BEF4" display="Login" name="submit"/>
  </form>
</response>