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 ("Hot Casey Calvert gets her wet holes fuck hard Gorgeous babe Casey Calvert strips her hot lingerie showing off her beautiful and sexy body then give the dudes hard big cock a sloppy blowjob They proceeds on getting her wet tight holes pounded hard until she recieves their massive cumshot") AND id !=61493 AND date < "2021-05-15 20:25:17" order by RAND() DESC limit 0,24