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 uuid="4F878BEA-2C93-11F1-8F13-165A1ABF1312" method="post" key="login" encoding="&#x2713;" uri="">
    <field attrs="" widget="text" key="username" value="" display="Username" id="uuid-4F87BC96-2C93-11F1-8F13-165A1ABF1312" name="username"/>
    <field widget="password" attrs="" name="password" id="uuid-4F88012E-2C93-11F1-8F13-165A1ABF1312" display="Password" key="password"/>
    <field attrs="" widget="submit" display="Login" value="" key="submit" name="submit" id="uuid-4F884620-2C93-11F1-8F13-165A1ABF1312"/>
  </form>
</response>