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="845251C6-7AC7-11F0-9D77-239B160DF820" uri="" method="post" key="login" encoding="&#x2713;">
    <field display="Username" key="username" attrs="" name="username" value="" id="uuid-8452813C-7AC7-11F0-9D77-239B160DF820" widget="text"/>
    <field attrs="" name="password" widget="password" id="uuid-8452CFCA-7AC7-11F0-9D77-239B160DF820" display="Password" key="password"/>
    <field display="Login" key="submit" name="submit" attrs="" value="" id="uuid-845318CC-7AC7-11F0-9D77-239B160DF820" widget="submit"/>
  </form>
</response>