Main/master, big change in openvpn config setup?

service network restart

Or ifdown and ifup with the interface name?

Tried that but it behaved erratically in my testing

Does user and group settings have any meaning as a protocol?
When I start the interface then openvpn stop with the message it can’t find the GID for the group?

OpenWrt has only root. If you need other users and or group you need to add them. I don't know if they're is a standard for packages and if there is any why it's missing from the openvpn package.

ā€˜Noone’ and ā€˜nogroup’ are default openwrt registered names in the users and group lists.
And OpenVPN worked with those names before, as the server wiki instruction says.

The idea is to block openvpn hacker intrusions (non root) from entering the general system control (root) once the server is started, not block the system (root) to enter openvpn settings.

Yes packages can define a required user.

Require-User is derived from USERID

Can be a simple user:group or you can specify the uid and gid.

I don’t really know why or what but I deleted the user and group settings in the config and remade them and then it works.