hAP ac2 - routeros-7.16.1-arm - wifi

RouterOS Beginner Basics
1

Wanting to re-use a hAP ac2 after a customer send it back after canceling his internet connection, I reset the router and uploaded the last routeros with netinstall.
My problem is that the default wifi config isn’t present.
For ease of config I usually use the default wifi config and change it to work as I wish. Since it isn’t there anymore I tried to create a new config using the Wiki for the wifi (https://help.mikrotik.com/docs/spaces/ROS/pages/224559120/WiFi) however, whenever I try to create the a wifi interface, it ask me for the “master-interface”, but I don’t have that, I find it nowhere and it don’t offer it to me as choice.

Must I create master-interface ? If yes with what information and how ?

2

Install appropriate package. wireless or wifi-qcom-ac.

3

Added info for clarification:
as of 7.13 you are required to load the wireless or wifi package as well when doing netinstall. Not only main ROS package.

BTW that Help page you linked to, go 1 level up and then see what’s written there, section Old 802.11ac ARM CPU devices:
https://help.mikrotik.com/docs/spaces/ROS/pages/1409138/Wireless#Wireless-Old802.11acARMCPUdevices*