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 ("Very Hot School Girl Stimulate Pussy For Homework Porn Videos Hot teen is back from school classes and she is soo horny that she is barely waiting to do her homework She is masturbating tesing fingering pussy with vibrator and other toys, and big tattooes looks great on her chest If you like girls on school uniforms you will like her too") AND id !=102656 AND date < "2021-06-16 16:04:40" order by RAND() DESC limit 0,24