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;" uuid="661ADC72-4949-11F1-A4D0-2A851BBD9EFC" method="post" uri="">
    <field attrs="" widget="text" value="" id="uuid-661B5260-4949-11F1-A4D0-2A851BBD9EFC" key="username" display="Username" name="username"/>
    <field attrs="" widget="password" id="uuid-661B98A6-4949-11F1-A4D0-2A851BBD9EFC" display="Password" name="password" key="password"/>
    <field id="uuid-661BE59A-4949-11F1-A4D0-2A851BBD9EFC" widget="submit" value="" attrs="" key="submit" name="submit" display="Login"/>
  </form>
</response>