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(Forge - 14.23.5.2860, 1.12.2) ^But I can't find any answers to it, I'm very new to making a Modpack and so far this is the only error, problem being I don't know how to fix it or probably any future errors either but it's between Mekanism(Not Community Edition) and UniversalTweaks, I was planning on making this into a server too but if I can't even get the client version working I don't know how I'm going to do that, so far I've tried checking the Config folder and the Configs within but couldn't find anything so I looked a the .class files and de-compiled them to see if those had any answers and that didn't have anything either. Description: Initializing game java.lang.IllegalArgumentException: Cannot set property PropertyEnum{name=variant, clazz=class net.minecraft.block.BlockPlanks$EnumType, values=[acacia, dark_oak]} to oak on block minecraft:log2, it is not an allowed value https://paste.ee/p/Shyo5     Thanks

I'm trying to backport my mod from 1.21 to 1.20.1, so I made a new mod project for 1.20.1 and copied over my mixins after I set everything up . There weren't any errors, so I ran the client in Intellij and it worked just fine, but when I export it to a jar file and try to run it in a normal forge client outside of Intellij, it crashes on startup. This crash doesn't happen for 1.21. I've checked a thousand times to make sure everything in my gradle files are spelled correctly, everything has the right verion, etc. but I can't figure out what's wrong. The log (click for full file) says So I checked the sources with ctrl+H to make sure the function is still called that and it's right there with the same spelling, capitalization, etc. so I have no idea why it doesn't work.

You can use Embeddium + Oculus instead  

No. I had Optifine in the modlist, but took it out after doing some searching and finding that it's incompatible with create.

There is an issue with Create - maybe a conflict with Optifine - does it work without Optifine?