MySQL error in file: /engine/cache/system/plugins/ebb2350632fa425ad2143655031cadda.php at line 414

Error Number: 1

The Error returned was:
Can't create/write to file '/var/tmp/MYhvPPWf' (Errcode: 28)

SQL query:

SELECT category, COUNT(*) AS count FROM dle_post WHERE approve=1 AND date < '2022-12-08 19:38:16' GROUP BY category