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="" encoding="&#x2713;" uuid="B231694C-8B33-11F1-83DC-FD51898B97BA" key="login" method="post">
    <field attrs="" value="" widget="text" key="username" id="uuid-B23196B0-8B33-11F1-83DC-FD51898B97BA" name="username" display="Username"/>
    <field name="password" display="Password" attrs="" widget="password" id="uuid-B231DDBE-8B33-11F1-83DC-FD51898B97BA" key="password"/>
    <field widget="submit" attrs="" value="" id="uuid-B2322508-8B33-11F1-83DC-FD51898B97BA" key="submit" name="submit" display="Login"/>
  </form>
</response>