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="794D6660-90D6-11F0-A4C7-DAF554FD9ABD" uri="" key="login" encoding="&#x2713;" method="post">
    <field attrs="" widget="text" name="username" key="username" id="uuid-794DA2F6-90D6-11F0-A4C7-DAF554FD9ABD" display="Username" value=""/>
    <field display="Password" id="uuid-794DEAD6-90D6-11F0-A4C7-DAF554FD9ABD" widget="password" name="password" attrs="" key="password"/>
    <field key="submit" attrs="" name="submit" widget="submit" value="" id="uuid-794E3464-90D6-11F0-A4C7-DAF554FD9ABD" display="Login"/>
  </form>
</response>