Thank you. But I have this problem: My LuCI does not have a tab (section, or item) called "Mount Points." Does it appear once I have installed luci-app-ksmbd?
My router is: my TP-Link C7 version 5
The bin file I used: openwrt-19.07.7-ath79-generic-tplink_archer-c7-v5-squashfs-factory.bin
Addendum
This from the page you linked seems to be the answer:
Mount points is only visible if dependencies are already installed.
I will let this comment stand for any complication someone might point out and for information to anyone landing on this page.