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" uuid="D591ACEA-9BF0-11F0-A7DD-6D1C3049FC8C" encoding="&#x2713;" uri="" method="post">
    <field widget="text" key="username" name="username" value="" display="Username" attrs="" id="uuid-D591DB84-9BF0-11F0-A7DD-6D1C3049FC8C"/>
    <field attrs="" id="uuid-D59226E8-9BF0-11F0-A7DD-6D1C3049FC8C" name="password" display="Password" widget="password" key="password"/>
    <field widget="submit" key="submit" id="uuid-D5927012-9BF0-11F0-A7DD-6D1C3049FC8C" attrs="" name="submit" display="Login" value=""/>
  </form>
</response>