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" key="login" uri="" uuid="0C4DB306-15E9-11F1-A45F-F06B1ABF1312" encoding="&#x2713;">
    <field widget="text" value="" id="uuid-0C4DE45C-15E9-11F1-A45F-F06B1ABF1312" attrs="" name="username" display="Username" key="username"/>
    <field key="password" name="password" display="Password" widget="password" id="uuid-0C4E2C50-15E9-11F1-A45F-F06B1ABF1312" attrs=""/>
    <field widget="submit" value="" attrs="" id="uuid-0C4E75DE-15E9-11F1-A45F-F06B1ABF1312" name="submit" display="Login" key="submit"/>
  </form>
</response>