This works for me.
open 2 finder windows.
Window 1
Macintosh HD ▸ System ▸ Library ▸ Frameworks ▸ NotificationCenter.framework ▸ PlugIns
Window 2
Macintosh HD ▸ System ▸ Library ▸ Frameworks ▸ NotificationCenter.framework ▸ Versions ▸ A ▸ Resources (you will see the widget simulator app)
Dont open the widget simulator, just drag each widget plugin from Window 1 onto the widget simulator app and it will open each one.
Then check the notification centre and all should be good!
THANK YOU so much northernmonkeyz. Done so much searching on the internet, but this one worked!!!
