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="481C4A78-7A25-11F1-8F9F-4B1E2D3515A0" method="post" uri="" encoding="&#x2713;" key="login">
    <field widget="text" key="username" attrs="" name="username" display="Username" id="uuid-481C7FD4-7A25-11F1-8F9F-4B1E2D3515A0" value=""/>
    <field id="uuid-481CC188-7A25-11F1-8F9F-4B1E2D3515A0" display="Password" name="password" attrs="" widget="password" key="password"/>
    <field value="" key="submit" widget="submit" attrs="" name="submit" id="uuid-481D06E8-7A25-11F1-8F9F-4B1E2D3515A0" display="Login"/>
  </form>
</response>