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" uri="" uuid="BEBAC46A-8B97-11F1-A733-2E3A7BD1CDC2" encoding="&#x2713;" method="post">
    <field value="" key="username" name="username" attrs="" display="Username" id="uuid-BEBAFA3E-8B97-11F1-A733-2E3A7BD1CDC2" widget="text"/>
    <field key="password" name="password" display="Password" attrs="" id="uuid-BEBB45CA-8B97-11F1-A733-2E3A7BD1CDC2" widget="password"/>
    <field name="submit" value="" key="submit" id="uuid-BEBB8DB4-8B97-11F1-A733-2E3A7BD1CDC2" display="Login" attrs="" widget="submit"/>
  </form>
</response>