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="" key="login" encoding="&#x2713;" uuid="ABCB2D1E-24FD-11F1-84B6-497E1ABF1312" method="post">
    <field value="" id="uuid-ABCB5D0C-24FD-11F1-84B6-497E1ABF1312" name="username" key="username" widget="text" attrs="" display="Username"/>
    <field widget="password" attrs="" key="password" name="password" id="uuid-ABCBA51E-24FD-11F1-84B6-497E1ABF1312" display="Password"/>
    <field display="Login" widget="submit" attrs="" key="submit" id="uuid-ABCBEE70-24FD-11F1-84B6-497E1ABF1312" value="" name="submit"/>
  </form>
</response>