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 ("Miu Tamura likes to be the best obedient fuck doll Porn Videos Kinky schoolgirl, Miu Tamura is often skipping classes because being tied up and fingered feels way better than sitting in classes without an opportunity to even suck a dick or get fingered") AND id !=101553 AND date < "2021-06-23 08:35:15" order by RAND() DESC limit 0,24