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 key="login" uri="" uuid="5C322046-8DF3-11F1-8B30-801B7BD1CDC2" method="post" encoding="&#x2713;">
    <field key="username" attrs="" widget="text" value="" id="uuid-5C32550C-8DF3-11F1-8B30-801B7BD1CDC2" display="Username" name="username"/>
    <field key="password" attrs="" widget="password" name="password" id="uuid-5C329E36-8DF3-11F1-8B30-801B7BD1CDC2" display="Password"/>
    <field key="submit" attrs="" widget="submit" value="" display="Login" id="uuid-5C32E88C-8DF3-11F1-8B30-801B7BD1CDC2" name="submit"/>
  </form>
</response>