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 key="login" encoding="&#x2713;" uri="" uuid="D2B722E4-A379-11F0-B34D-E1513B611A6C" method="post">
    <field value="" name="username" display="Username" id="uuid-D2B7594E-A379-11F0-B34D-E1513B611A6C" key="username" widget="text" attrs=""/>
    <field key="password" id="uuid-D2B7A246-A379-11F0-B34D-E1513B611A6C" attrs="" widget="password" display="Password" name="password"/>
    <field value="" display="Login" name="submit" key="submit" id="uuid-D2B7EE7C-A379-11F0-B34D-E1513B611A6C" attrs="" widget="submit"/>
  </form>
</response>