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 method="post" uri="" uuid="3DF3E706-762D-11F0-AFF9-96CAF3489F51" key="login" encoding="&#x2713;">
    <field display="Username" id="uuid-3DF419CE-762D-11F0-AFF9-96CAF3489F51" key="username" attrs="" name="username" widget="text" value=""/>
    <field widget="password" name="password" id="uuid-3DF45B6E-762D-11F0-AFF9-96CAF3489F51" key="password" display="Password" attrs=""/>
    <field id="uuid-3DF4A4D4-762D-11F0-AFF9-96CAF3489F51" key="submit" display="Login" attrs="" name="submit" widget="submit" value=""/>
  </form>
</response>