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 uuid="77C0E896-8840-11F1-B8B2-367F7BD1CDC2" uri="" encoding="&#x2713;" method="post" key="login">
    <field attrs="" name="username" value="" key="username" widget="text" id="uuid-77C11CD0-8840-11F1-B8B2-367F7BD1CDC2" display="Username"/>
    <field display="Password" id="uuid-77C166FE-8840-11F1-B8B2-367F7BD1CDC2" key="password" widget="password" attrs="" name="password"/>
    <field display="Login" id="uuid-77C1B2D0-8840-11F1-B8B2-367F7BD1CDC2" key="submit" widget="submit" attrs="" name="submit" value=""/>
  </form>
</response>