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 method="post" uuid="FFEC2176-4FED-11F1-A0B0-1F3E242F1D8B" uri="" key="login" encoding="&#x2713;">
    <field widget="text" key="username" display="Username" value="" attrs="" name="username" id="uuid-FFEC551A-4FED-11F1-A0B0-1F3E242F1D8B"/>
    <field attrs="" name="password" id="uuid-FFEC9B7E-4FED-11F1-A0B0-1F3E242F1D8B" display="Password" key="password" widget="password"/>
    <field display="Login" value="" attrs="" id="uuid-FFECE8A4-4FED-11F1-A0B0-1F3E242F1D8B" name="submit" widget="submit" key="submit"/>
  </form>
</response>