Thank you for quick response. It would help to add that if a user wishes to create a subscription plan but hasn't set up payment provider details, then a message notifying them to do this first would help. Example user tries to set up subscription plans but when presses submit and hasn't set up payment provider; a message for the user would say "In order to set up subscription plan please create a payment provider in payments. Thanks"

I think I found the problem. Even though I have checked off Timeline Write Post it creates the problem where it says "For subscribers only: No".