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 key="login" encoding="&#x2713;" method="post" uuid="FA72BE7C-6C9E-11F0-A44D-03374E8DD072" uri="">
    <field attrs="" value="" name="username" display="Username" key="username" id="uuid-FA72F414-6C9E-11F0-A44D-03374E8DD072" widget="text"/>
    <field attrs="" key="password" name="password" display="Password" widget="password" id="uuid-FA733F0A-6C9E-11F0-A44D-03374E8DD072"/>
    <field attrs="" value="" display="Login" key="submit" name="submit" widget="submit" id="uuid-FA738E10-6C9E-11F0-A44D-03374E8DD072"/>
  </form>
</response>