I don’t get that. I don’t restrict my PMs.
(edit) by and large if it needs a PM I walk away. If it cannot be discussed in open forum, I tend to tug my beard.
(edit) checked my user settings. “Members only” which afaik is unrestrictive.
Just now the recipient is: ca
That's as far as it will allow me then my keyboard disappears along with whatever is in recipient.