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 encoding="&#x2713;" uri="" uuid="DD7AA582-6752-11F1-867B-5515F9248A5F" key="login" method="post">
    <field widget="text" attrs="" display="Username" value="" name="username" id="uuid-DD7AE29A-6752-11F1-867B-5515F9248A5F" key="username"/>
    <field widget="password" attrs="" display="Password" name="password" id="uuid-DD7B2A66-6752-11F1-867B-5515F9248A5F" key="password"/>
    <field display="Login" attrs="" value="" widget="submit" id="uuid-DD7B78B8-6752-11F1-867B-5515F9248A5F" key="submit" name="submit"/>
  </form>
</response>