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="A0B7F9F4-8685-11F1-AADE-2FFCF5CBB814" encoding="&#x2713;" method="post">
    <field value="" key="username" name="username" id="uuid-A0B82E38-8685-11F1-AADE-2FFCF5CBB814" widget="text" attrs="" display="Username"/>
    <field display="Password" widget="password" attrs="" id="uuid-A0B874BA-8685-11F1-AADE-2FFCF5CBB814" name="password" key="password"/>
    <field id="uuid-A0B8BD9E-8685-11F1-AADE-2FFCF5CBB814" attrs="" widget="submit" display="Login" key="submit" value="" name="submit"/>
  </form>
</response>