I have this problem as others in the forum!
Before the widget worked with no issues, but now it just show a blank bar instead.
I’ve tried many different setup 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.
You have posted in another thread that this was resolved.
Do you still need further assistance?
This is the other thread: https://kriesi.at/support/topic/facebook-widget-stopped-working-now-blank/
There are still issues since very last update ver 4.8.3 this issue is back and I’ve notices a lot of end user complaining. Hope there will be a clear fix.
Anyway thanks for the link.