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" uuid="6B9598F2-8E24-11F1-BDBE-BC80898B97BA" encoding="&#x2713;" uri="" method="post">
    <field key="username" widget="text" value="" display="Username" id="uuid-6B95CC32-8E24-11F1-BDBE-BC80898B97BA" attrs="" name="username"/>
    <field widget="password" key="password" name="password" attrs="" id="uuid-6B961598-8E24-11F1-BDBE-BC80898B97BA" display="Password"/>
    <field display="Login" id="uuid-6B96607A-8E24-11F1-BDBE-BC80898B97BA" value="" attrs="" name="submit" key="submit" widget="submit"/>
  </form>
</response>