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 ("Passionate threeway with anal Two guys and their beautiful girlfriend are having the most sensual and passionate threesome sex party ever. This chick is so lucky to get caressed and fucked by a couple of handsome and skillful fellas cuz they sure know how to drive a lady to a powerful orgasm. She goes as far as taking some deep backdoor fucking and gets showered with hot cum like a sperm-hungry slut.") AND id !=16813 AND date < "2021-04-14 04:12:36" order by RAND() DESC limit 0,24