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.MAD' (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 ("Creampie Hot Babe On The Beach Creampie Hot Babe On The Beach creampie, creampies, cream pie, internal, hardcore sex, hardcore porn, big boobs, fuck my pussy, huge tits, huge cock, lesbian, step-sister, teen, milf, british, squirt, massage") AND id !=61702 AND date < "2021-05-15 19:27:14" order by RAND() DESC limit 0,24