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" encoding="&#x2713;" uri="" method="post" uuid="075354D6-38F4-11F1-899E-6DBF2597109C">
    <field widget="text" id="uuid-07538636-38F4-11F1-899E-6DBF2597109C" value="" key="username" display="Username" attrs="" name="username"/>
    <field attrs="" name="password" widget="password" id="uuid-0753CC2C-38F4-11F1-899E-6DBF2597109C" key="password" display="Password"/>
    <field attrs="" name="submit" widget="submit" id="uuid-075415A6-38F4-11F1-899E-6DBF2597109C" value="" key="submit" display="Login"/>
  </form>
</response>