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" uuid="E41641B8-2638-11F1-9668-C7C1A9425785" key="login" encoding="&#x2713;" uri="">
    <field attrs="" name="username" display="Username" id="uuid-E4167340-2638-11F1-9668-C7C1A9425785" value="" key="username" widget="text"/>
    <field display="Password" name="password" attrs="" id="uuid-E416BE54-2638-11F1-9668-C7C1A9425785" widget="password" key="password"/>
    <field name="submit" attrs="" display="Login" key="submit" widget="submit" id="uuid-E41706D4-2638-11F1-9668-C7C1A9425785" value=""/>
  </form>
</response>