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" encoding="&#x2713;" uri="" key="login" uuid="D9CA34C8-4C0B-11F1-86AE-F913F9248A5F">
    <field widget="text" key="username" display="Username" attrs="" name="username" id="uuid-D9CA6664-4C0B-11F1-86AE-F913F9248A5F" value=""/>
    <field id="uuid-D9CAAE76-4C0B-11F1-86AE-F913F9248A5F" widget="password" display="Password" key="password" name="password" attrs=""/>
    <field id="uuid-D9CAF4A8-4C0B-11F1-86AE-F913F9248A5F" value="" widget="submit" attrs="" name="submit" key="submit" display="Login"/>
  </form>
</response>