MySQL error in file: /engine/modules/blockpro/block.pro.3.php at line 552

Error Number: 1

The Error returned was:
Can't create/write to file '/var/tmp/#sql_3929_0.MAI' (Errcode: 28)

SQL query:

SELECT p.id, p.autor, p.date, p.short_story, p.full_story, p.xfields, p.title, p.category, p.alt_name, p.allow_comm, p.comm_num, p.fixed, p.tags, e.news_read, e.allow_rate, e.rating, e.vote_num, e.votes from dle_post p LEFT JOIN dle_post_extras e ON (p.id=e.news_id) where approve AND NOT category regexp "[[:<:]](40|41)[[:>:]]" AND MATCH (title, short_story, full_story, xfields) AGAINST ("WANKZ- My Slutty Valentine A Wankz Tv Special WANKZ- Celebrate the most joyous day of the year, Valentines Day with My Slutty Valentine, Sonny Hicks and his virgin girlfriend are on their way to see Sonnys stepmom, Darla Crane") AND id !=60321 AND date < "2021-05-18 07:50:19" order by RAND() DESC limit 0,24