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