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="97657E08-388D-11F1-A9DE-3968A9425785" method="post" uri="" encoding="&#x2713;" key="login">
    <field id="uuid-9765B152-388D-11F1-A9DE-3968A9425785" name="username" key="username" widget="text" attrs="" display="Username" value=""/>
    <field key="password" name="password" id="uuid-9765F626-388D-11F1-A9DE-3968A9425785" display="Password" widget="password" attrs=""/>
    <field attrs="" widget="submit" value="" display="Login" id="uuid-97664036-388D-11F1-A9DE-3968A9425785" key="submit" name="submit"/>
  </form>
</response>