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="" encoding="&#x2713;" method="post" uuid="676C1F68-7302-11F1-8873-6E1D242F1D8B" key="login">
    <field value="" widget="text" id="uuid-676C5CBC-7302-11F1-8873-6E1D242F1D8B" key="username" display="Username" name="username" attrs=""/>
    <field key="password" name="password" display="Password" attrs="" widget="password" id="uuid-676CA794-7302-11F1-8873-6E1D242F1D8B"/>
    <field id="uuid-676CF780-7302-11F1-8873-6E1D242F1D8B" widget="submit" value="" attrs="" display="Login" name="submit" key="submit"/>
  </form>
</response>