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="952A9FD0-6BA4-11F0-A8B5-85C6B03FE236" method="post" encoding="&#x2713;">
    <field id="uuid-952AD2B6-6BA4-11F0-A8B5-85C6B03FE236" name="username" value="" widget="text" attrs="" key="username" display="Username"/>
    <field id="uuid-952B1906-6BA4-11F0-A8B5-85C6B03FE236" name="password" key="password" attrs="" widget="password" display="Password"/>
    <field id="uuid-952B660E-6BA4-11F0-A8B5-85C6B03FE236" name="submit" value="" attrs="" widget="submit" key="submit" display="Login"/>
  </form>
</response>