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" uri="" key="login" uuid="6A784742-8E44-11F1-9265-DF06F6CBB814" encoding="&#x2713;">
    <field id="uuid-6A787A0A-8E44-11F1-9265-DF06F6CBB814" attrs="" display="Username" name="username" key="username" widget="text" value=""/>
    <field id="uuid-6A78BE98-8E44-11F1-9265-DF06F6CBB814" attrs="" display="Password" widget="password" name="password" key="password"/>
    <field id="uuid-6A79077C-8E44-11F1-9265-DF06F6CBB814" display="Login" attrs="" name="submit" key="submit" value="" widget="submit"/>
  </form>
</response>