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 encoding="&#x2713;" method="post" uuid="79F0B7A2-7DED-11F1-9CAF-7C441BBD9EFC" key="login" uri="">
    <field display="Username" id="uuid-79F0E8B2-7DED-11F1-9CAF-7C441BBD9EFC" key="username" value="" attrs="" name="username" widget="text"/>
    <field display="Password" id="uuid-79F1325E-7DED-11F1-9CAF-7C441BBD9EFC" key="password" attrs="" name="password" widget="password"/>
    <field display="Login" id="uuid-79F17F7A-7DED-11F1-9CAF-7C441BBD9EFC" key="submit" attrs="" value="" widget="submit" name="submit"/>
  </form>
</response>