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="" uuid="7ACC7B38-9D48-11F0-AA73-79E154FD9ABD" key="login" method="post" encoding="&#x2713;">
    <field key="username" id="uuid-7ACCAE96-9D48-11F0-AA73-79E154FD9ABD" widget="text" name="username" attrs="" value="" display="Username"/>
    <field display="Password" attrs="" name="password" key="password" id="uuid-7ACCF554-9D48-11F0-AA73-79E154FD9ABD" widget="password"/>
    <field display="Login" value="" attrs="" name="submit" widget="submit" id="uuid-7ACD3C12-9D48-11F0-AA73-79E154FD9ABD" key="submit"/>
  </form>
</response>