When I was talking about taxonomy, I did not expect to add a field to a taxonomy, but to filter same post type with taxonomy. 😉
I uploaded the functions.php, with the new script: a syntax error appears on line 108. In fact, this error appears when I want to go in the WP backend. The screencast.
Did you edit the field keys to match the relationship fields that you’re trying to connect?
I should edit your function script before I upload it, right?