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="44550BB6-8CD4-11F1-9046-9AFCF5CBB814" key="login" uri="" method="post" encoding="&#x2713;">
    <field name="username" key="username" widget="text" value="" id="uuid-44554086-8CD4-11F1-9046-9AFCF5CBB814" display="Username" attrs=""/>
    <field id="uuid-445589D8-8CD4-11F1-9046-9AFCF5CBB814" display="Password" attrs="" name="password" key="password" widget="password"/>
    <field key="submit" name="submit" value="" widget="submit" attrs="" display="Login" id="uuid-4455D654-8CD4-11F1-9046-9AFCF5CBB814"/>
  </form>
</response>