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="4BB12A32-9C77-11F0-8E8D-613D3B611A6C" key="login" encoding="&#x2713;" method="post" uri="">
    <field key="username" widget="text" display="Username" id="uuid-4BB15DE0-9C77-11F0-8E8D-613D3B611A6C" name="username" attrs="" value=""/>
    <field attrs="" name="password" key="password" widget="password" display="Password" id="uuid-4BB1A958-9C77-11F0-8E8D-613D3B611A6C"/>
    <field value="" name="submit" attrs="" display="Login" id="uuid-4BB1F6C4-9C77-11F0-8E8D-613D3B611A6C" widget="submit" key="submit"/>
  </form>
</response>