Crash Report UUID: af2f931d-18ed-4e4e-86a2-28af1ed2cc8a
        RoadRunner != Lithium: This instance was launched using RoadRunner, which is an *unofficial* Lithium fork! Please **do not** report bugs to them![18:31:31] [main/FATAL] [minecraft/Main]: Failed to start the minecraft server
net.minecraftforge.fml.LoadingFailedException: Loading errors encountered: [
        Tinkers' Construct (tconstruct) has failed to load correctly
?7org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
]
        at net.minecraftforge.fml.ModLoader.waitForTransition(ModLoader.java:269) ~[forge:?] {re:classloading}
        at net.minecraftforge.fml.ModLoader.dispatchAndHandleError(ModLoader.java:236) ~[forge:?] {re:classloading}
        at net.minecraftforge.fml.ModLoader.gatherAndInitializeMods(ModLoader.java:194) ~[forge:?] {re:classloading}
        at net.minecraftforge.fml.server.ServerModLoader.load(ServerModLoader.java:44) ~[forge:?] {re:classloading}
        at net.minecraft.server.Main.main(Main.java:95) ~[?:?] {re:classloading}
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_333] {}
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_333] {}
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_333] {}
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_333] {}
        at net.minecraftforge.fml.loading.FMLServerLaunchProvider.lambda$launchService$0(FMLServerLaunchProvider.java:51) ~[forge.jar:36.2] {}
        at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.1.3.jar:?] {}
        at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.1.3.jar:?] {}
        at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.1.3.jar:?] {}
        at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.1.3.jar:?] {re:classloading}
        at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.1.3.jar:?] {re:classloading}
        at net.minecraftforge.server.ServerMain$Runner.runLauncher(ServerMain.java:63) [forge.jar:?] {}
        at net.minecraftforge.server.ServerMain$Runner.access$100(ServerMain.java:60) [forge.jar:?] {}
        at net.minecraftforge.server.ServerMain.main(ServerMain.java:57) [forge.jar:?] {}
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i figured out the issue, im using an older version of tinker construct. having the newest version allows the server to load properly, but i kind of need to use the older version. Both are 1.16.5 the one that isnt working is just slightly older.