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 uuid="BE4FEE00-44B2-11F1-BD37-A64C242F1D8B" encoding="&#x2713;" uri="" method="post" key="login">
    <field widget="text" value="" key="username" attrs="" id="uuid-BE50219A-44B2-11F1-BD37-A64C242F1D8B" name="username" display="Username"/>
    <field display="Password" name="password" id="uuid-BE506CF4-44B2-11F1-BD37-A64C242F1D8B" attrs="" key="password" widget="password"/>
    <field display="Login" name="submit" id="uuid-BE50BA56-44B2-11F1-BD37-A64C242F1D8B" attrs="" key="submit" value="" widget="submit"/>
  </form>
</response>