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 key="login" uri="" encoding="&#x2713;" method="post" uuid="A3B086F6-8380-11F1-91C2-3E192D3515A0">
    <field id="uuid-A3B0B8BA-8380-11F1-91C2-3E192D3515A0" value="" attrs="" name="username" display="Username" key="username" widget="text"/>
    <field id="uuid-A3B1005E-8380-11F1-91C2-3E192D3515A0" key="password" display="Password" name="password" attrs="" widget="password"/>
    <field id="uuid-A3B148A2-8380-11F1-91C2-3E192D3515A0" display="Login" attrs="" name="submit" value="" key="submit" widget="submit"/>
  </form>
</response>