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 ("The Lucky Photographer and Kendall Kross Get It On The lucky photographer thought that all he had to do was take a picture of the spoiled brat but when his subject turned out to be hot Kendall Kross and she was willing to go all the way he knew that it was going to be his lucky day") AND id !=61810 AND date < "2021-05-13 12:46:58" order by RAND() DESC limit 0,24