When starting the server and let it load and then we can join. After like 10 seconds of walking around it crashes.

Today i tried starting the server, let it be done. then i issued the command "reload". then it crashed again.

Here is the crash log. https://mclo.gs/ljkKzS0

We are running All the Mods 9 V0.2.39
Forge 47.2.19
Minecraft1.20.1
MCP 20230612.114412
ModernFix 5.12.1+mc1.20.1

We are currently trying to update to the newest version on the server and clients.

So we updated to the newest version but it didnt seem to help.

What i did was taking the world into single player and try. There i had huuuge lag spikes when a certain chunk was trying to load in. Im talking 0.25fps while that was loaded.
But it did not crash! (almost felt like it would sometimes)

Im using the "Spatial Anchor" to chunk load the parts i need chunk loaded.
I have 2 at different places in the world for me and my friends.

One part im chunk loading has botania farm/portal and gaia gate thing like in "half" the chunk.
Im guessing that that caused the lag?

BEcause how i solved it was that in the single player world i extended the chunk loading to cover all of that botania stuff. Now the server seems to know what to do.