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" encoding="&#x2713;" uri="" uuid="E369E06C-1441-11F0-A2CA-D4D7F3489F51" method="post">
    <field widget="text" display="Username" attrs="" key="username" id="uuid-E36A1442-1441-11F0-A2CA-D4D7F3489F51" value="" name="username"/>
    <field attrs="" id="uuid-E36A5786-1441-11F0-A2CA-D4D7F3489F51" key="password" widget="password" display="Password" name="password"/>
    <field name="submit" display="Login" widget="submit" id="uuid-E36AA2AE-1441-11F0-A2CA-D4D7F3489F51" key="submit" value="" attrs=""/>
  </form>
</response>