Spanien als Wirtschaftsstandort

WordPress-Datenbank-Fehler: [Can't find FULLTEXT index matching the column list]
SELECT aus2019_posts.*, MATCH (aus2019_posts.post_title,aus2019_posts.post_content) AGAINST ('Spanien als Wirtschaftsstandort ') as score FROM aus2019_posts WHERE 1=1 AND ( ( aus2019_posts.post_date >= '2019-07-02 00:00:00' AND aus2019_posts.post_date <= '2022-07-01 09:01:36' ) ) AND aus2019_posts.ID NOT IN (850) AND aus2019_posts.post_type IN ('post', 'page') AND ((aus2019_posts.post_status = 'publish' OR aus2019_posts.post_status = 'inherit')) AND MATCH (aus2019_posts.post_title,aus2019_posts.post_content) AGAINST ('Spanien als Wirtschaftsstandort ') ORDER BY score DESC LIMIT 0, 15