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 ("Wild Couple Enjoy Oral and Hard Sex Listen to her moaning and going wild panting breathless as her partner gives her orgasm with tongue and finger before fucking Shes riding it like a cowgirl and enjoying it like shes hungry for sex while riding the cock she continue playing and fingering her super wet pussy") AND id !=61409 AND date < "2021-05-15 20:49:10" order by RAND() DESC limit 0,24