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 encoding="&#x2713;" key="login" uri="" method="post" uuid="EA704F4A-2FDE-11F1-8433-68C50C0019C7">
    <field attrs="" value="" key="username" name="username" display="Username" widget="text" id="uuid-EA7084C4-2FDE-11F1-8433-68C50C0019C7"/>
    <field attrs="" name="password" key="password" display="Password" widget="password" id="uuid-EA70C998-2FDE-11F1-8433-68C50C0019C7"/>
    <field id="uuid-EA710F20-2FDE-11F1-8433-68C50C0019C7" display="Login" widget="submit" key="submit" name="submit" attrs="" value=""/>
  </form>
</response>