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" encoding="&#x2713;" uri="" key="login" uuid="ECD5DA7A-74F4-11F0-9B8D-74FDF3489F51">
    <field widget="text" name="username" value="" display="Username" key="username" id="uuid-ECD60C52-74F4-11F0-9B8D-74FDF3489F51" attrs=""/>
    <field id="uuid-ECD651DA-74F4-11F0-9B8D-74FDF3489F51" key="password" display="Password" attrs="" widget="password" name="password"/>
    <field display="Login" key="submit" id="uuid-ECD69B68-74F4-11F0-9B8D-74FDF3489F51" attrs="" name="submit" widget="submit" value=""/>
  </form>
</response>