Configuration de suppression d'assistant

Hello
Go to the apple in the top left of your screen, system preferences, bluetooth, advanced..., uncheck the box that says open Bluetooth settings assistant automatically if no input device is available.

Hello again,
the box is unchecked and the problem still exists;
However, the three other boxes that follow are checked.
1 Allow Bluetooth devices to wake the computer
2 Verify each incoming audio request
3 Share my internet connection with other Bluetooth devices.

For your information: I am not using an Ethernet cable for connection but Wi-Fi
my mouse and keyboard are Bluetooth.

Good evening
in the preferences system, bluetooth, remove your bluetooth mouse and keyboard by clicking the little -
Reconfigure it by pressing the plus.
In order to remove them, you will need to disconnect. (You will probably need a wired mouse and a wired keyboard to do this.)

Hi again,

Unfortunately, it doesn't work because don't forget that my mouse and keyboard are Bluetooth, so I have to check ACTIVE in order to be able to work with + or -.

If I work with the wired mouse, there’s no problem, the Bluetooth configuration assistant message doesn’t appear anymore, but that’s not my case.

I used the wired mouse, I removed the keyboard and mouse, then I reinstalled the Bluetooth mouse and keyboard and still have the problem, following an update of the iMac;
For a year, I never had this problem.

still no solution to my problem

Hello
Try repairing your permissions in Disk Utility.

Thank you Jebreen,
Your last post was the right solution, problem solved.