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="" encoding="&#x2713;" uuid="77C7C8A2-3E6A-11F1-93A7-9FAE0C0019C7" key="login" method="post">
    <field id="uuid-77C7FED0-3E6A-11F1-93A7-9FAE0C0019C7" attrs="" widget="text" name="username" display="Username" value="" key="username"/>
    <field id="uuid-77C8478C-3E6A-11F1-93A7-9FAE0C0019C7" attrs="" display="Password" name="password" widget="password" key="password"/>
    <field id="uuid-77C892FA-3E6A-11F1-93A7-9FAE0C0019C7" attrs="" display="Login" name="submit" widget="submit" value="" key="submit"/>
  </form>
</response>