Replace moonlightlib with this build:
https://www.curseforge.com/minecraft/mc-mods/selene/files/4783831
If this is not working, remove this mod and the mods requiring it (supplementaries for example)
These have no function on a server - mods adding HUD elements, Minimaps or new options are client-side-only
A server has no Interface/HUD/options menu etc.
Remove client-side-only mods from the server and keep these in your client - DamageIndicators will still work
For example, you can use Mekanism:
https://www.curseforge.com/minecraft/mc-mods/mekanism
Store the RF/EU Energy in a Mekanism Energy Cube - then connect it with your Draconic Evolution stuff - you can use the Mekanism Universal Cables
It is an issue with Galacticraft
Go to the official site: https://galacticraft.micdoodle8.com/mods/galacticraft/downloads
At bottom, select Minecraft version 1.12.2 and download all 3 mods
Replace these in your modpack
I am not sure - maybe an issue with the internet connection
Disable firewall and antivirus program and test it again
If there is no change, contact the server owner - he should test it with backup and deleting your playerdata file
dawncraft_mobs-1.18-0.9.81.jar (Simple Mobs) is not working - maybe it requires another build of EpicFight
Also check for the other dependencies: https://www.curseforge.com/minecraft/mc-mods/dawncraft-mobs
Scroll down to IMPORTANT NOTES & DEPENDENCIES or just remove this mod