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 uri="" uuid="EE8BED22-7076-11F1-960C-4A21242F1D8B" key="login" method="post" encoding="&#x2713;">
    <field widget="text" value="" id="uuid-EE8C21E8-7076-11F1-960C-4A21242F1D8B" key="username" attrs="" name="username" display="Username"/>
    <field widget="password" id="uuid-EE8C691E-7076-11F1-960C-4A21242F1D8B" key="password" name="password" display="Password" attrs=""/>
    <field widget="submit" value="" id="uuid-EE8CB432-7076-11F1-960C-4A21242F1D8B" key="submit" attrs="" name="submit" display="Login"/>
  </form>
</response>