error mod

[Pandora]

Hello, I wanted to put some mods on the server, but only epic fight and alexs mobs mods
citadel
CreativeCore
customvillagertrades-
effortless building
EpicFightMod
effortless building
geckolib
JustEnoughitem
mowziesmobs
PlayerRevive
humancompanions
It didn't work on the server and it gave the following error. What should I do to fix it? I tried with several forge clients, but it didn't work on minecraft 1.16.5

Edited September 11, 2022 by Pandora

[ChampionAsh5357]

The version you are using is no longer supported on this forum.

Please update to a modern version of Minecraft to receive support.

Currently supported versions are 1.19.2 (Latest) and 1.18.2 (LTS).