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" key="login" encoding="&#x2713;" uuid="D093BB08-7BD3-11F0-8EE6-9F5362E0087B" uri="">
    <field attrs="" name="username" id="uuid-D093EBBE-7BD3-11F0-8EE6-9F5362E0087B" widget="text" display="Username" key="username" value=""/>
    <field attrs="" name="password" id="uuid-D0943768-7BD3-11F0-8EE6-9F5362E0087B" widget="password" display="Password" key="password"/>
    <field attrs="" name="submit" id="uuid-D09480B0-7BD3-11F0-8EE6-9F5362E0087B" display="Login" widget="submit" value="" key="submit"/>
  </form>
</response>