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="4D2A0348-7ACB-11F0-976A-419B160DF820" uri="" method="post" key="login" encoding="&#x2713;">
    <field key="username" display="Username" id="uuid-4D2A3778-7ACB-11F0-976A-419B160DF820" value="" widget="text" name="username" attrs=""/>
    <field key="password" display="Password" id="uuid-4D2A7F62-7ACB-11F0-976A-419B160DF820" widget="password" name="password" attrs=""/>
    <field attrs="" name="submit" id="uuid-4D2ACB7A-7ACB-11F0-976A-419B160DF820" value="" widget="submit" display="Login" key="submit"/>
  </form>
</response>