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 ("Sexy Busty Blonde Babe Hard Pussy Masturbation Watch this horny sexy webcam girl getting naked while she doing a blowjob with her favorite dildo then plays her pussy with her dildo while fingering her cunt infront of the webcam See how her tight juicy pussy gets wet as her toy fuck her so hard while she fingering and playing her clit then she also use her dildo into her ass hole which she really like the most until she reached her orgasm") AND id !=61183 AND date < "2021-05-13 11:55:18" order by RAND() DESC limit 0,24