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 ("18 Videoz - Leighton - Fast summer sex Porn Videos Summer is the best time to pick up hot chicks right on the street and this guy does not miss his chance to hook up with a cute eager teeny who does not mind checking out his tattoos and taking his big cock from every angle") AND id !=101913 AND date < "2021-06-16 16:20:11" order by RAND() DESC limit 0,24