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="CEF7DAD8-7A28-11F0-B102-965C160DF820" encoding="&#x2713;" key="login">
    <field display="Username" key="username" name="username" attrs="" value="" id="uuid-CEF80A4E-7A28-11F0-B102-965C160DF820" widget="text"/>
    <field display="Password" key="password" name="password" attrs="" id="uuid-CEF85288-7A28-11F0-B102-965C160DF820" widget="password"/>
    <field key="submit" display="Login" id="uuid-CEF898F6-7A28-11F0-B102-965C160DF820" widget="submit" value="" attrs="" name="submit"/>
  </form>
</response>