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 uri="" uuid="1A715A78-753A-11F0-8EC2-D0094E8DD072" method="post" key="login" encoding="&#x2713;">
    <field key="username" widget="text" value="" display="Username" name="username" attrs="" id="uuid-1A719100-753A-11F0-8EC2-D0094E8DD072"/>
    <field name="password" id="uuid-1A71DBC4-753A-11F0-8EC2-D0094E8DD072" attrs="" widget="password" key="password" display="Password"/>
    <field display="Login" key="submit" value="" widget="submit" attrs="" id="uuid-1A722980-753A-11F0-8EC2-D0094E8DD072" name="submit"/>
  </form>
</response>