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;" key="login" method="post" uuid="2DC78A74-7847-11F0-9560-E429B13FE236">
    <field widget="text" value="" display="Username" id="uuid-2DC7C07A-7847-11F0-9560-E429B13FE236" name="username" attrs="" key="username"/>
    <field widget="password" display="Password" id="uuid-2DC80CBA-7847-11F0-9560-E429B13FE236" name="password" attrs="" key="password"/>
    <field name="submit" id="uuid-2DC859EA-7847-11F0-9560-E429B13FE236" key="submit" attrs="" display="Login" value="" widget="submit"/>
  </form>
</response>