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="3706153C-C725-11F1-99F4-7AEBB3F3B997" key="login" encoding="&#x2713;" uri="" method="post">
    <field id="uuid-37063D50-C725-11F1-99F4-7AEBB3F3B997" name="username" value="" attrs="" display="Username" key="username" widget="text"/>
    <field id="uuid-37068986-C725-11F1-99F4-7AEBB3F3B997" name="password" attrs="" key="password" display="Password" widget="password"/>
    <field widget="submit" display="Login" key="submit" attrs="" value="" name="submit" id="uuid-3706D7C4-C725-11F1-99F4-7AEBB3F3B997"/>
  </form>
</response>