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="" key="login" method="post" uuid="5E0AE56E-676B-11F1-A7CF-667C242F1D8B" encoding="&#x2713;">
    <field key="username" name="username" id="uuid-5E0B1930-676B-11F1-A7CF-667C242F1D8B" widget="text" value="" display="Username" attrs=""/>
    <field attrs="" display="Password" id="uuid-5E0B600C-676B-11F1-A7CF-667C242F1D8B" widget="password" key="password" name="password"/>
    <field widget="submit" id="uuid-5E0BA936-676B-11F1-A7CF-667C242F1D8B" name="submit" key="submit" attrs="" display="Login" value=""/>
  </form>
</response>