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="33B9D67C-8CA4-11F1-B623-2F92FD48BEF4" key="login" method="post" uri="" encoding="&#x2713;">
    <field display="Username" id="uuid-33BA089A-8CA4-11F1-B623-2F92FD48BEF4" value="" attrs="" name="username" key="username" widget="text"/>
    <field attrs="" key="password" name="password" widget="password" display="Password" id="uuid-33BA512E-8CA4-11F1-B623-2F92FD48BEF4"/>
    <field display="Login" id="uuid-33BA9DDC-8CA4-11F1-B623-2F92FD48BEF4" value="" attrs="" key="submit" name="submit" widget="submit"/>
  </form>
</response>