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 uri="" method="post" encoding="&#x2713;" uuid="3FB507B6-61B3-11F0-A76B-408C62E0087B" key="login">
    <field key="username" widget="text" id="uuid-3FB52656-61B3-11F0-A76B-408C62E0087B" value="" display="Username" name="username" attrs=""/>
    <field attrs="" display="Password" name="password" id="uuid-3FB54640-61B3-11F0-A76B-408C62E0087B" widget="password" key="password"/>
    <field key="submit" value="" name="submit" display="Login" id="uuid-3FB569AE-61B3-11F0-A76B-408C62E0087B" widget="submit" attrs=""/>
  </form>
</response>