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="ED8C28EE-3F7D-11F1-ABE5-92900C0019C7" key="login" encoding="&#x2713;" uri="" method="post">
    <field id="uuid-ED8C5E86-3F7D-11F1-ABE5-92900C0019C7" widget="text" attrs="" display="Username" value="" name="username" key="username"/>
    <field key="password" name="password" display="Password" attrs="" widget="password" id="uuid-ED8CA828-3F7D-11F1-ABE5-92900C0019C7"/>
    <field value="" key="submit" name="submit" id="uuid-ED8CEF4A-3F7D-11F1-ABE5-92900C0019C7" widget="submit" attrs="" display="Login"/>
  </form>
</response>