Issue with familly subscription plan

I can't add my friend to the familly plan, idk why it says"invitation is invalid", same when i gave him the invitation link. PLS some help would be welcome, the chatbot is completely lost and the contact support may take up to 4 days.
There are limitations on who can join a Family Plan
https://support.chess.com/en/articles/10067907-friends-family-plan-faq
https://support.chess.com/en/articles/10067907-friends-family-plan-faq#h_ce25a24b5b
I can't add my friend to the familly plan, idk why it says"invitation is invalid", same when i gave him the invitation link. PLS some help would be welcome, the chatbot is completely lost and the contact support may take up to 4 days.