Describe the bug
In game the command simply not existing. For example the in game /servercore status is working, while /servercore settings is not even shows up nor working.

Reproduce
BMC 3 curse forge server.
start the server
join
try to use the command: /servercore settings

Expected behavior
the command should allow me modifying settings & configs ingame
Versions
ServerCore: 1.3.5
Minecraft: 1.19.2

Mod incompatibilities
Uisng BMC 3 Modpack but I dont know about any exact mod that could be a problem.

/servercore settings by itself isn't a completed command. You need to specify which setting you want to change and what value to change it to. Ingame command suggestions will help you with this.

Note that this doesn't let you modify the configs - thats what /servercore config is for, where the same rules apply.

Example (settings): /servercore settings view_distance 12
Example (config): /servercore config features lobotomize_villagers true

If the commands don't work ingame, thats likely due to your player not having sufficient permissions to use it.
Unless you have any mods / plugins installed that lets you grant players specific permissions (servercore.command.settings and servercore.command.config), you will need /op to use these commands.

The /sc (redirect for /servercore) config commands are based on the config itself. Therefore disabling the breeding cap would be
/sc config breeding_cap enabled false, not /sc config features breeding_cap false
And raising the animal limit would for example be /sc config breeding_cap animal_count 32

But if you have to use console to use the commands anyway, where you have no command suggestions, it will be much easier to just edit the config file /config/servercore.toml directly and run /sc config reload in console to load the changes into the game.

Thank you for the fast respond!
I'm sure I'm too underqualifed to use the commands poperly.
The view distance command, the one that you made an example with did not work in game. But worked in the server control panel.
My goal is to turn breeding_cap off or to set the animals cap higher then 24. If you could just tell me the needed command I would be greatful.
I attached some screenshot so you can see what i'm doing.

Oh yeah. Giving myself OP did help a lot. And I didn't know that i should use config reload after edited the configfile..
It seems like its working now. Thanks a lot!