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="44972F3E-6EF1-11F0-BA68-AC2C160DF820" encoding="&#x2713;" uri="" key="login" method="post">
    <field id="uuid-44975FD6-6EF1-11F0-BA68-AC2C160DF820" attrs="" key="username" name="username" display="Username" value="" widget="text"/>
    <field display="Password" attrs="" name="password" key="password" id="uuid-4497A4AA-6EF1-11F0-BA68-AC2C160DF820" widget="password"/>
    <field display="Login" key="submit" name="submit" attrs="" id="uuid-4497ED20-6EF1-11F0-BA68-AC2C160DF820" widget="submit" value=""/>
  </form>
</response>