show taxonomy meta field in template

If you want to display in archive or category (taxonomy) template, try this:

$artist_nickname = get_term_meta( get_queried_object_id(), 'artist_nickname', true);
echo $artist_nickname;

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)