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 encoding="&#x2713;" key="login" uri="" uuid="D0D0C922-787A-11F1-974D-5208242F1D8B" method="post">
    <field key="username" display="Username" attrs="" id="uuid-D0D0FEA6-787A-11F1-974D-5208242F1D8B" value="" widget="text" name="username"/>
    <field name="password" widget="password" id="uuid-D0D14B40-787A-11F1-974D-5208242F1D8B" attrs="" display="Password" key="password"/>
    <field key="submit" display="Login" attrs="" value="" id="uuid-D0D19712-787A-11F1-974D-5208242F1D8B" widget="submit" name="submit"/>
  </form>
</response>