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;" uri="" method="post" key="login" uuid="153801DE-75E8-11F0-B7E1-B6B362E0087B">
    <field name="username" widget="text" key="username" value="" id="uuid-15383474-75E8-11F0-B7E1-B6B362E0087B" display="Username" attrs=""/>
    <field id="uuid-15387BBE-75E8-11F0-B7E1-B6B362E0087B" attrs="" display="Password" name="password" key="password" widget="password"/>
    <field name="submit" widget="submit" key="submit" value="" id="uuid-1538C4CA-75E8-11F0-B7E1-B6B362E0087B" display="Login" attrs=""/>
  </form>
</response>