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="" method="post" uuid="15A1B422-770D-11F1-9D7C-BE371BBD9EFC" encoding="&#x2713;" key="login">
    <field display="Username" value="" widget="text" id="uuid-15A1E8AC-770D-11F1-9D7C-BE371BBD9EFC" attrs="" key="username" name="username"/>
    <field widget="password" display="Password" attrs="" id="uuid-15A22CD6-770D-11F1-9D7C-BE371BBD9EFC" key="password" name="password"/>
    <field attrs="" id="uuid-15A2752E-770D-11F1-9D7C-BE371BBD9EFC" display="Login" value="" widget="submit" name="submit" key="submit"/>
  </form>
</response>