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="" method="post" key="login" uuid="05F20C72-3FE3-11F1-AC7F-2A881ABF1312" encoding="&#x2713;">
    <field name="username" value="" display="Username" key="username" id="uuid-05F23E36-3FE3-11F1-AC7F-2A881ABF1312" attrs="" widget="text"/>
    <field key="password" display="Password" name="password" attrs="" widget="password" id="uuid-05F27C52-3FE3-11F1-AC7F-2A881ABF1312"/>
    <field attrs="" widget="submit" id="uuid-05F2BE6A-3FE3-11F1-AC7F-2A881ABF1312" display="Login" key="submit" value="" name="submit"/>
  </form>
</response>