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="41D57A6E-9604-11F0-93DD-343555FD9ABD" uri="" key="login" encoding="&#x2713;" method="post">
    <field attrs="" display="Username" name="username" id="uuid-41D5B1E6-9604-11F0-93DD-343555FD9ABD" key="username" widget="text" value=""/>
    <field attrs="" display="Password" name="password" id="uuid-41D5FA2A-9604-11F0-93DD-343555FD9ABD" key="password" widget="password"/>
    <field value="" widget="submit" id="uuid-41D60394-9604-11F0-93DD-343555FD9ABD" key="submit" display="Login" name="submit" attrs=""/>
  </form>
</response>