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 encoding="&#x2713;" uuid="843C4E76-321E-11F1-A501-98E57F2D798A" uri="" key="login" method="post">
    <field key="username" display="Username" attrs="" name="username" id="uuid-843C8F3A-321E-11F1-A501-98E57F2D798A" widget="text" value=""/>
    <field attrs="" name="password" widget="password" id="uuid-843CDD3C-321E-11F1-A501-98E57F2D798A" key="password" display="Password"/>
    <field value="" id="uuid-843D2E90-321E-11F1-A501-98E57F2D798A" widget="submit" attrs="" name="submit" display="Login" key="submit"/>
  </form>
</response>