First place a unit or group you want to command members of
Then create a spawn point for the faction you will play as
Then click “v” to open the first page of the scenario properties and make sure the faction you want to play as is enabled
Then click play to spawn in
Then walk up close to the unit you want to command and while facing them click “~” and the top option on the scroll wheel will give the option to recruit click it with left mouse
Repeat for any additional units you desire to recruit as you only recruit one at a time rather than entire groups
From here press “~” to open the command menu and it should work as intended seamlessly
When using the map use right mouse to open a radial menu and use the bottom option to add commands through the map
If you follow all these steps and for whatever reason the recruit prompt doesn't show in the wheel then press the follow me prompt and if the player says a line and does an animation that should fix it, now when you try to recruit an AI it should give you the prompt