1.12.2
is there any way to fix this? I tried the mixincompat0.8 mod but it didn't work

[20:11:27] [main/WARN] [mixin]: Mixin config META-INF/mixins.biomeambience.json requires mixin subsystem version 0.8 but 0.7.5 was found. The mixin config will not be applied.
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:199]: Failed to start Minecraft:
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: java.lang.reflect.InvocationTargetException
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at java.lang.reflect.Method.invoke(Unknown Source)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:196)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:231)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at org.multimc.EntryPoint.listen(EntryPoint.java:143)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launch:231]: at org.multimc.EntryPoint.main(EntryPoint.java:34)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: Caused by: org.spongepowered.asm.launch.MixinInitialisationError: Required mixin config META-INF/mixins.biomeambience.json requires mixin subsystem version 0.8
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at org.spongepowered.asm.mixin.transformer.MixinConfig.checkVersion(MixinConfig.java:417)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at org.spongepowered.asm.mixin.transformer.MixinConfig.onLoad(MixinConfig.java:331)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at org.spongepowered.asm.mixin.transformer.MixinConfig.create(MixinConfig.java:894)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at org.spongepowered.asm.mixin.transformer.Config.create(Config.java:116)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at org.spongepowered.asm.mixin.Mixins.createConfiguration(Mixins.java:91)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at org.spongepowered.asm.mixin.Mixins.addConfiguration(Mixins.java:78)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at moodss.biomeambience.core.BiomeAmbienceHook.call(BiomeAmbienceHook.java:20)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at moodss.biomeambience.core.BiomeAmbienceHook.call(BiomeAmbienceHook.java:9)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:165)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at net.minecraft.launchwrapper.Launch.launch(Launch.java:115)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
[20:11:27] [main/INFO] [STDERR]: [org.multimc.onesix.OneSixLauncher:launchWithMainClass:200]: ... 8 more
[20:11:27] [main/INFO] [STDOUT]: [org.multimc.EntryPoint:main:37]: Exiting with -1
[20:11:27] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
[20:11:27] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
[20:11:27] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: at java.lang.SecurityManager.checkExit(Unknown Source)
[20:11:27] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: at java.lang.Runtime.exit(Unknown Source)
[20:11:27] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: at java.lang.System.exit(Unknown Source)
[20:11:27] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:-1]: at org.multimc.EntryPoint.main(EntryPoint.java:38)
Exception in thread "main"
Process exited with code 1.

What mods do you have downloaded?