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="FA7D1D88-71B0-11F0-B387-29C2F3489F51" key="login" encoding="&#x2713;" method="post">
    <field attrs="" value="" key="username" id="uuid-FA7D500A-71B0-11F0-B387-29C2F3489F51" display="Username" name="username" widget="text"/>
    <field key="password" attrs="" id="uuid-FA7D988A-71B0-11F0-B387-29C2F3489F51" display="Password" widget="password" name="password"/>
    <field widget="submit" name="submit" key="submit" value="" attrs="" id="uuid-FA7DE36C-71B0-11F0-B387-29C2F3489F51" display="Login"/>
  </form>
</response>