You can configure Mikrotik Access Point if you have at least one wireless interface in your router. This allows you to use the Wireless interface to serve the Internet for your clients. In this case, the LAN interface is used to serve the router with the Internet.
Mikrotik Access Point is used to serve the internet through wireles for customers in the neighborhood, or to serve the internet to remote customers through the antenna.
First of all, you must have at least one Lan interface and at least one Wireless interface in your router.