Focus Keyword sniper perview not working

Last time i use 4.2.3 it working, but when i update to new version 4.2.4 it not working anymore. Focus Keyword not running and sniper perview too. So, I download old version and install again 4.2.3 that not help me. it’s still found the problem. Sorry for my english.

https://wordpress.org/plugins/wordpress-seo/