Cannot install Drupal 8 on Windows 8 XAMPP PHP 5.6 Additional uncaught exception thrown while handling exception



Cannot install D8 in latest XAMPP workstation on Win8. Can install D7 though.

I did increase max_allowed_packet = 64M
You have comments disabled in your opcache configuration. Add the following line 

opcache.save_comments=1 in php.ini or if opcache has its own config file

Please consult this for more details.