array_key_exists() expects parameter 2 to be array, boolean given in aioseop_class.php on line 4735

[wpsmort]

Reported here https://wordpress.org/support/topic/error-message-767/

Also reported by Jim Douglas by email today.

[wpsmort]

Awaiting access to the sites so we can troubleshoot and reproduce.

[wpsmort]

Reported by Carole Asselin by email today.

[arnaudbroes]

This was happening because BuddyPress user profiles are considered some kind of post type but there's no actual post meta data tied to them which is why get_post_meta() is returning false instead of an array.