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="" method="post" uuid="B5D9CFC4-17FE-11F1-B89D-F6A52597109C">
    <field display="Username" key="username" value="" widget="text" id="uuid-B5D9F8BE-17FE-11F1-B89D-F6A52597109C" name="username" attrs=""/>
    <field key="password" display="Password" attrs="" id="uuid-B5DA4274-17FE-11F1-B89D-F6A52597109C" name="password" widget="password"/>
    <field value="" display="Login" key="submit" attrs="" widget="submit" id="uuid-B5DA8BF8-17FE-11F1-B89D-F6A52597109C" name="submit"/>
  </form>
</response>