warjort

It still says one of your mod files is corrupted/broken.

If the java virtual machine is not shutting down when you stop the server, you likely have a stuck thread. Getting a thread dump may show what is stuck: https://www.baeldung.com/java-thread-dump

If the block is in the server's spawn chunks then yes. Those are the chunks where the player initially spawns in the overworld and are always loaded. Otherwise, you are maybe force loading chunks somehow. e.g. using Level.getBlockState() without first checking Level.isLoaded(BlockPos) ?

Please don't post logs in the forums, use a file upload site. Since there is no error in that log, post a link to your launcher_log.txt

The only place in vanilla I know about that checks structure bounds is in NaturalSpawner.isInNetherFortressBounds() for blaze/wither skeleton spawning. That uses the StructureManager which can be obtained from ServerLever.structureManager()

Unless you helping the original poster of the thread, start your own thread.

You need to provide your logs/debug.log so we can see what error (if any) you are getting. Otherwise, make a copy of your world as a test world. Using that test world experiment with removing mods until the problem goes away. I would start with optifine and any other "optimisation" mods you have. They are always the first candidates for strange bugs. Immersive portals would be another candidate since this seems to be incompatible with a large number of mods.

You can't have both jei and rei

That log does not contain an error. It is likely a hard crash. As I said before, post your launcher_log.txt

Look at EnderEyeItem.use() which locates the nearest stronghold (StructureTags.EYE_OF_ENDER_LOCATED)

Use java 17, mixin does not support java 20

Oculus is a broken client side only mod you don't need on the server.

Try it without any mods. If you still get the problem without any mods then the problem is with your forge installation. Try reinstalling forge. If you are using a launcher that installs forge for you, you need to ask whoever provides the launcher.

https://johann.loefflmann.net/en/software/jarfix/index.html

Use java 17, mixin does not support java 19

https://forge.gemwire.uk/wiki/Dependencies#Deobfuscating_Dependencies

The stone cutter block (like other vanilla blocks) only has one output/result slot. So its recipes can only have 1 output. If you want something differernt, you will need to make your own block with its own recipes.

Rubidium is a client side mod. It can't load client classes on the server.

Conflict between rubidium and chunkanimator. Check you have the latest versions of these mods then contact the mod authors.

You do that with datapacks. Your mod is a datapack I would recommend you do it as a new world preset (like large biomes or amplified) rather than unconditionally overwriting the nether. e.g. this is botania (garden of glass) preset that overrides the overworld to be "botania:skyblock" https://github.com/VazkiiMods/Botania/blob/47ce293b8b93974dd3aa4c98fa229f1f83913b06/garden_of_glass/data/gardenofglass/worldgen/world_preset/gardenofglass.json You would instead override the nether to be your generator

You have a mod trying to load client classes on the server: The error message does not say which mod. I can see an earlier reference to rubidium which is a client side mod you don't need on the server. You might have others?

Looks like one of your mods is corrupted. Probably because it didn't finish downloading properly? The error message does not say which mod.

Issue with the midnight hats or midnight-lib mods. Check you have the latest versions then contact the mod author.