Log in to the Kinetic Panel.
Shut down the server.
Navigate to the file manager.
Go to ConanSandbox> Config > DefaultServerSettings.ini
Locate AdminPassword=
Enter a password.
Save the file.
Start the server.
Open the game
Load into the game.
Open the pause menu and click settings
Open server settings.
Click on Make me admin & enter the password
Conan Exiles guide
How to become Admin on Conan Exiles
How to become an admin on your Conan Exiles server