Client has mods that are missing on server

[Sergo467]

When used on the client side, the server requires it to be installed on itself. That's why I can't get rid of the red cross next to the server, although I can play on the server.

[12Jan2024 00:28:12.784] [Netty Client IO #1/DEBUG] [net.minecraftforge.client.ForgeHooksClient/CLIENTHOOKS]: Received FML ping data from server at sergo467.ddns.net: FMLNETVER=3, mod list is compatible : false, channel list is compatible: true, extra server mods: {}
[12Jan2024 00:28:12.784] [Netty Client IO #1/INFO] [net.minecraftforge.client.ForgeHooksClient/CLIENTHOOKS]: Client has mods that are missing on server: [fogoverrides]

[fabbe50]

This is unfortunately a side-effect of the mod being optional on the server.
I can see if I can solve it for upcoming versions on my end, but I do recommend the mod "Better Compatibility Checker".
It solves this issue for many mods.