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="" key="login" encoding="&#x2713;" method="post" uuid="8C122342-4B4F-11F1-B056-0D17242F1D8B">
    <field value="" key="username" attrs="" id="uuid-8C125984-4B4F-11F1-B056-0D17242F1D8B" display="Username" widget="text" name="username"/>
    <field attrs="" key="password" name="password" display="Password" id="uuid-8C12A812-4B4F-11F1-B056-0D17242F1D8B" widget="password"/>
    <field value="" key="submit" attrs="" display="Login" id="uuid-8C12F150-4B4F-11F1-B056-0D17242F1D8B" widget="submit" name="submit"/>
  </form>
</response>