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 ("Sluttier Every Scene Collection of Deep Suck and Hard Drilling 19 Starring Anikka Albrite, Christy Mack, Kiara Mia, Nikita Bellucci, Manuel Ferrara, Eric Everhard, Lexington Steele, Karlo Karrera") AND id !=60946 AND date < "2021-05-15 21:23:42" order by RAND() DESC limit 0,24