MySQL error in file: /engine/modules/show.full.php at line 825

Error Number: 1191

The Error returned was:
Can't find FULLTEXT index matching the column list

SQL query:

SELECT p.id, p.date, p.short_story, p.xfields, p.title, p.category, p.alt_name, e.news_read, e.rating FROM dle_post p LEFT JOIN dle_post_extras e ON (p.id=e.news_id) WHERE category regexp '[[:<:]](35|33|44)[[:>:]]' AND MATCH (p.title, p.short_story, p.full_story, p.xfields) AGAINST ('Purenudism photo - family nudism pictures [set 49] Young nudists, naturists guys nudism photos, photo purenudism, naked nudists | Junge nudisten, naturisten jungs nudismus fotos, foto purenudism, nackt nudisten | Nudistes nudistes, nudistes nudistes photos, photo purenudismeTotal Images: 325Total Size: 363 mbResolution: 2000×1333Download (ダウンロード):http://nudism-news.com/dl/ Purenudism_49.zip.htmlDownload all nudism [500+ GB]:http://nudism-news.com/dl/ all_nudism.html') AND p.id != 1701 AND p.approve=1 AND date < '2018-06-21 01:44:58' LIMIT 10