#Forge 1.20.1 Server Crashing — JEED & Create Mod Compatibility Issues

47 messages · Page 1 of 1 (latest)

wary steppe
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I’m trying to launch a custom Forge 1.20.1 modpack on my server and I’ve been troubleshooting for hours. I I’m stuck on a persistent crash during startup.
Here’s what I’ve confirmed:

  • Server is set to Forge 47.4.0 and Java 17
  • I’ve removed JEED and JEI from the mods/ folder, but the crash log still shows JEED trying to load and failing due to missing dependencies
  • I’ve also cleared config/, defaultconfigs/, and serverconfig/ folders of JEED-related files, but the error persists
  • The second crash is from the Create mod, which throws a MixinTransformerError. I’m using create-1.20.1-6.0.6.jar and create_central_kitchen-1.20.1-for-create-6.0.4-1.4.1.jar, which may be incompatible
  • The log also shows a missing class from Farmers Respite (CoffeeBushBlock), which Central Kitchen appears to be trying to hook into
    Additionally, the log mentions:
    Class version 61 required is higher than the class version supported by the current version of Mixin (JAVA_16 supports class version 60)
    Even though the server is set to Java 17, this message keeps appearing.
    Could this be a GPORTAL environment issue — like cached mod data, auto-restored configs, or a misreported Java version? I’ve wiped and re-uploaded the server pack multiple times, but the same crash keeps happening.
    Any help would be massively appreciated. I’m happy to provide full logs or modpack files if needed.
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the modpack is a slightly tweaked version of society : sunlight valley

frozen badge
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Not sure whom to ping here xD
What game is this again?

wary steppe
frozen badge
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It's alright xD
<@&1339547788916035674>

celest cave
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@wary steppe - I don't know much about Forge, but is there a plugin somewhere that's called mixin-x.x.x.jar?

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This error is implying that there is a library in one of the mods that compiles other plugins to the mods using java 16, but since the server is running java 17, it fails with this message.

wary steppe
wary steppe
celest cave
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What version is in the mixin .jar?

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Oh it's coming from create- jar

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Ok still digging 😄

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Looks like Mixin 0.8.5 is the latest.

Essentially minecraft server won't start if it gets that class version error from one of the plugins.

wary steppe
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thats the server pack its sending rn

celest cave
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Oh yeah so one mod downloads it as a dependency right

wary steppe
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im not even sure really

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im not sure if the pack is able to send

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i just like copied the config and everything onto the client

celest cave
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Looks like create-central-kitchen made a change in their code to work with create-6.0.6, but hasn't pushed it out to curse or other loaders yet

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Does the server start without the create-central-kitchen?

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Just to debug and see if it is that mod

wary steppe
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ill delete i deleted everything off of my server and im reinstalling

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i will try this

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thank you

wary steppe
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im uploading kubejs file so ill prob be here for 10 mins

image.png
celest cave
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If there's a way to load in one plugin at a time to try it (like load in society-sunlit-valley first) then start the server. Check it. Then stop server, load in create mod and then start it etc.

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Hopefully that shows one by one the mods that conflict

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It's tedius, but it's been the only way I've fixed most of my modded servers

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Shouldn't need to worry about mods that get auto pulled

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Hopefully they should work for the mod that pulls them in

wary steppe
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souh

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i cant really pause kube js cuz its integral

celest cave
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🤞

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Yeah kube js is fine to load first

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I'd just load it and start the server and check that it works etc.

wary steppe
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yeah

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ok yeah

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it froze halfway and i have to redo it

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lol

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im mad

wary steppe
# celest cave Yeah kube js is fine to load first

ok i have woken up. kubejs is installed . i ran the server and it actually ran for a while it was loading and i saw cpu usage and then randomly cpu usage dropped to 0 and i let it go for like 10 mins and it didnt load

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my server crashed again and here is what happened

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am i not able to send links