MySQL error in file: /engine/modules/show.full.php at line 1187

Error Number: 1

The Error returned was:
Can't create/write to file '/var/tmp/#sql_59a_0.MAI' (Errcode: 2)

SQL query:

SELECT id, date, short_story, xfields, title, category, alt_name, MATCH (title, short_story, full_story, xfields) AGAINST ('СТС ') as score FROM dle_post WHERE MATCH (title, short_story, full_story, xfields) AGAINST ('СТС ') AND id != 7506 AND approve=1 AND date < '2023-11-30 00:34:05' ORDER BY score DESC LIMIT 10