I have tried the ACF for user register on a single site. It works great. But the same fields group won’t work on multisite.
So I check the codes in includes/forms/form-user.php. It only do_action to ‘register_form’. This action is called in wp-login.php, and it is only used for single site user registration. On multisite, WP uses wp-signup.php for user registration. I believe the action “signup_extra_fields” in wp-signup.php can be used to add extra user meta fields.
How can I tell ACF to render extra user meta for the action “signup_extra_fields”.
