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 method="post" encoding="&#x2713;" uri="" key="login" uuid="BF8668EE-17B2-11F1-83FD-F9F32597109C">
    <field key="username" attrs="" display="Username" value="" widget="text" id="uuid-BF869968-17B2-11F1-83FD-F9F32597109C" name="username"/>
    <field attrs="" key="password" widget="password" display="Password" id="uuid-BF86DCAC-17B2-11F1-83FD-F9F32597109C" name="password"/>
    <field name="submit" id="uuid-BF872B62-17B2-11F1-83FD-F9F32597109C" display="Login" widget="submit" value="" attrs="" key="submit"/>
  </form>
</response>