Team, I need help on my facebook plugin 'coz I got an error

Hi Team,

I need help on my facebook plugin 'coz I got an error message applying my App Id. Ive got same issue on this tickets:

https://premium.wpmudev.org/forums/topic/why-am-i-getting-an-error-message-from-facebook

https://premium.wpmudev.org/forums/topic/why-the-plugin-doesnt-accept-my-facebook-app-api

I checked my setup and no spacing found when I applied my app id and secret, also my sandbox is disabled and my app is verified by Facebook. Please see attached screenshots.

Also another issue I got is that the like/share button at the top of my homepage message is not showing when I'm not login on my wp account. Please help, hope to hear from you soon.

Thanks,
David