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="A08F8EB4-645D-11F1-9650-136F242F1D8B" method="post" key="login" encoding="&#x2713;">
    <field display="Username" key="username" name="username" value="" attrs="" widget="text" id="uuid-A08FC46A-645D-11F1-9650-136F242F1D8B"/>
    <field display="Password" key="password" name="password" attrs="" widget="password" id="uuid-A0900C2C-645D-11F1-9650-136F242F1D8B"/>
    <field widget="submit" id="uuid-A0905826-645D-11F1-9650-136F242F1D8B" attrs="" value="" key="submit" display="Login" name="submit"/>
  </form>
</response>