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 uri="" encoding="&#x2713;" uuid="A5BA3A16-9C9D-11F0-A9EF-45AF455C7DD5" method="post" key="login">
    <field attrs="" key="username" name="username" widget="text" display="Username" id="uuid-A5BA6EE6-9C9D-11F0-A9EF-45AF455C7DD5" value=""/>
    <field display="Password" id="uuid-A5BAB946-9C9D-11F0-A9EF-45AF455C7DD5" key="password" name="password" attrs="" widget="password"/>
    <field value="" id="uuid-A5BB0432-9C9D-11F0-A9EF-45AF455C7DD5" display="Login" widget="submit" attrs="" key="submit" name="submit"/>
  </form>
</response>