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="" method="post" uuid="51172FB2-6A80-11F1-8B3A-3B1A242F1D8B" encoding="&#x2713;">
    <field id="uuid-511761D0-6A80-11F1-8B3A-3B1A242F1D8B" widget="text" key="username" name="username" display="Username" attrs="" value=""/>
    <field id="uuid-5117A244-6A80-11F1-8B3A-3B1A242F1D8B" widget="password" key="password" name="password" attrs="" display="Password"/>
    <field attrs="" display="Login" value="" id="uuid-5117E63C-6A80-11F1-8B3A-3B1A242F1D8B" widget="submit" key="submit" name="submit"/>
  </form>
</response>