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" method="post" encoding="&#x2713;" uri="" uuid="0B6F68F8-845C-11F1-86F7-CB35898B97BA">
    <field id="uuid-0B6FA2BE-845C-11F1-86F7-CB35898B97BA" value="" name="username" widget="text" display="Username" attrs="" key="username"/>
    <field id="uuid-0B6FE4C2-845C-11F1-86F7-CB35898B97BA" widget="password" name="password" display="Password" key="password" attrs=""/>
    <field key="submit" attrs="" display="Login" widget="submit" value="" name="submit" id="uuid-0B702A7C-845C-11F1-86F7-CB35898B97BA"/>
  </form>
</response>