How do I get the Communications messages in Membership to send?

Hi there,

I have been trying for weeks to figure out why the Communications module in Membership is not sending the messages as expected.

Please could someone log into my wp-admin to check this out.

I am aware of the following related threads, but none of them provide a meaningful response: (my own thread, to which I've not received any response).

Please, I am desperate for an answer.