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" encoding="&#x2713;" uri="" uuid="16AC9B70-9310-11F0-BAAF-45C254FD9ABD" method="post">
    <field value="" attrs="" key="username" id="uuid-16ACD37E-9310-11F0-BAAF-45C254FD9ABD" widget="text" name="username" display="Username"/>
    <field display="Password" name="password" widget="password" key="password" id="uuid-16AD1B36-9310-11F0-BAAF-45C254FD9ABD" attrs=""/>
    <field widget="submit" display="Login" name="submit" value="" key="submit" id="uuid-16AD6762-9310-11F0-BAAF-45C254FD9ABD" attrs=""/>
  </form>
</response>