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="867A459E-9278-11F0-965F-BA823B611A6C" uri="" key="login" method="post">
    <field name="username" key="username" display="Username" widget="text" id="uuid-867A78CA-9278-11F0-965F-BA823B611A6C" value="" attrs=""/>
    <field attrs="" id="uuid-867AC136-9278-11F0-965F-BA823B611A6C" key="password" display="Password" widget="password" name="password"/>
    <field name="submit" key="submit" display="Login" widget="submit" id="uuid-867B0A2E-9278-11F0-965F-BA823B611A6C" value="" attrs=""/>
  </form>
</response>