Receiving following error.
Forge 39.0.55
Minecraft 1.18.1

Full mod list

Alexs Mobs 1.16.0
Citadel 1.10.8
Cucumber 1.18.1-5.0.2
Decorative Blocks 1.18.1-2.0.2
Farmers Delighht 1.18.1-1.0.3
Golden Hopper 1.2.5-1.18.1
jei 1.18.1-9.2.1.69
Mystical Agriculture 1.18.1-5.0.1
Optifine 1.18.1
SmarterFarmers 1.18-1.2.1

Error message seems to be suggesting an issue of interation between hopper and capsid block, which I have in the world.

`

[22Jan2022 01:31:10.340] [Server thread/ERROR] [net.minecraft.server.MinecraftServer/]: Encountered an unexpected exception

at net.minecraft.server.MinecraftServer.m_5703_(MinecraftServer.java:868) ~[server-1.18.1-20211210.034407-srg.jar%2347!/:?]

Full Log

https://pastebin.com/XU95eScV

Full Server crash log

https://pastebin.com/rcTLcYEB

update alexs mobs