TileEntity

Looks like an issue outside of Minecraft - make a test with disabled firewall/antivirus program

Temporarily switch to the Technic Launcher and install a clean forge modpack and use this as working base

Is there an installer log? Add this one with sites like https://paste.ee/

Maybe some kind of Network error - I am not sure

Use Java 17 instead of Java 21

Same issue without sophisticatedbackpacks?

Maybe another biome related mod

Remove Rubidium - you are already using Embeddium which is a fork of Rubidium (same mod base)

The tlauncher is a cracked launcher - these are not supported here

Add the crash-report or latest.log (logs-folder) with sites like https://paste.ee/ The pastebin link is not available anymore

Make a test without the camping mod

Delete the config of nochatreports (config folder) If there is no change, remove this mod

Maybe an issue with TerraBlender - make a test without this mod

Make a test without sophisticatedstorage

Add the new crash-report

Also remove nochatreports

Also make a test without Oculus/Iris

Make a test without openpartiesandclaims

Still the same issue - so it is another mod - I have no idea which one

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

It is a ModMismatchDisconnected - your friends are not using the same mods or modpack as your server

Same issue without XaeroWorldMap?

There is an issue with galaxyspace - try the latest build: https://www.curseforge.com/minecraft/mc-mods/galaxy-space-addon-for-galacticraft/files/5064931 or an older build: https://www.curseforge.com/minecraft/mc-mods/galaxy-space-addon-for-galacticraft/files/3873609

inventoryhud is a client-side-mod Remove it from the server, keep it in your client

Maybe it is part of another mod - make a test without polymorph