TileEntity

Add the latest.log from your logs-folder

Remove coloredlights from your server

Make a test without Aether

Maybe it is a conflict with another mod (which is not mentioned) or some kind of bug - report it to the creator

Make a test without ModernFix

Try the older build https://www.curseforge.com/minecraft/mc-mods/mafglib/files/4764350

Check for the latest.log (logs-folder) and add this one

Add the crash-report with sites like https://paste.ee/ and paste the link to it here

And without BOP and Terralith?

You can try Rubidium + Oculus as alternative

Change the Java 8 build https://www.azul.com/downloads/?version=java-8-lts&os=windows&architecture=x86-64-bit&package=jre&show-old-builds=true Scroll down to 8u302b08 and install this build Then edit your start.bat and use: "C:\Program Files\Zulu\zulu-8-jre\bin\javaw.exe" -Xms1024M -Xmx6144M -jar forge-1.16.5-36.2.20.jar pause

Make a test without Optifine

Maybe one of the "Better" structures mod is causing issues with BOP/Terralith Remove the stucturemods like BetterFortresses, BetterJungleTemples etc one by one

I have no idea - still an issue with valkyrienskies Maybe just use the Zink Flavor 1.20.1 modpack as working base and add/remove mods

It is an issue with MaFgLib Maybe these issues refer to Optifine - make a test without Optifine

Try other builds of these

Remove all mods and make a test just with forge - if this works, add the mods one by one or in groups

Make a test without XaeroWorldMap

Delete the config of valkyrienskies and test it again

yes

Make a test without wythers

Create a new modpack instance and start with valkyrienskies and embeddium Use the mods from the modpack If this works, add the rest of your mods one by one or in groups

There is an issue with immersiverailroading - maybe a conflict with entity_texture_features

It is a fork of Rubidium - test it with embeddium

Maybe an issue with architectury or a mod requiring it