Can't Connect to Facebook and Instagram App

Getting the following errors when trying to connect to Facebook & Instagram app.

“something went wrong” - this occurs when it’s almost finalized connecting but then it’s almost like the app crashes and it doesn’t finalize and then it says to try again in a few moments but the same error continues to occur.

I have reinstalled the app many times and tried different browsers and devices.

I have been in contact backwards and forwards with Meta support for the past couple of months and they have not been able to resolve the issue.

Any suggestions?

Hi,
Could you try deleting the Facebook Channel completely and waiting at least 24 hours before setting it up again?

Have tried this already, same error still exists.