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" key="login" uri="" uuid="766A0F48-4599-11F1-85D4-A919242F1D8B" encoding="&#x2713;">
    <field widget="text" id="uuid-766A3F90-4599-11F1-85D4-A919242F1D8B" key="username" name="username" value="" display="Username" attrs=""/>
    <field attrs="" display="Password" id="uuid-766A857C-4599-11F1-85D4-A919242F1D8B" key="password" name="password" widget="password"/>
    <field key="submit" name="submit" id="uuid-766ACCBC-4599-11F1-85D4-A919242F1D8B" widget="submit" display="Login" attrs="" value=""/>
  </form>
</response>