Do you need to have the same mods locally in order to play on a modded server? [duplicate]
Solution 1:
Indeed you do.
Some mods do not need the Server to have it also installed, and vice versa.
IE: Optifine installed on client doesnt require it to be on the server.
But any mod that adds a new item/block for everyone to use will need to be installed on both your Minecraft and the server.