TileEntity

Are you in creative mode? Are other players in creative mode?

Add the full crash-report or latest.log (logs-folder) with sites like https://mclo.gs/ and paste the link to it here

Maybe Connector or enigmaticlegacy

Make a test without Ksyxis, Essential and lithium/radium

Same issue with another Launcher like MultiMC or AT Launcher?

Do you mean the forge installer?

Cracked Launchers are not supported

mts refers to Immersive Vehicles

But does this name contain special characters or spaces?

Cracked Launchers are not supported

Use the official Crafting Dead modpack as working base and add new mods one by one https://www.curseforge.com/minecraft/modpacks/crafting-dead-modpack

Add the full crash-report

Make a test without Leawind's Third Person mod

Same issue without Embeddium/Oculus?

In the server.properties, set max-tick-time to -1 and test it again

Remove the mod watut

It is an issue with MCEF - remove it or replace it with this build: https://www.curseforge.com/minecraft/mc-mods/mcef/files/4876491

Add the full crash-report or latest.log (logs-folder) with sites like https://mclo.gs/ and paste the link to it here

And without any mods? Just Forge?

Remove randompatches

Make a test with deleting the options.txt - looks like a keybind is invalid

Same issue

ClassMetadataNotFoundException: net.rocketpowered.sdk.Rocket Looks like a mod is missing - something related to Rockets - I have no idea which mod

I have no idea

This is the last line before the crash: [ebwizardry]: Synchronising spell emitters for PixelTraveler But I have no idea what this means