ok… Problem Solved! It was caused by a country restriction on Facebook. Spain was added, but for some reason, it was still blocked. I’ve eliminate all the restrictions and voila!
I’m having exactly the same problem!
Before the widget worked with no issues, but now it just show a blank bar instead.
I’ve tried different options but with no success.
I don’t use a cache plugin, but Nitro Pack as page accelerator. The problem was there from BEFORE Nitro, and it doesn’t go away when I turn it off, anyway.
Don’t mind… I’ve fix the issue by my own.
It boiled down to apply the check mark on Appearance>Menu> and check the home page in the list.
For some reason, it went disabled and so the theme showed all the pages in the main menu.
GREAT!
Thank you