A mod crashed on startup!
net.fabricmc.loader.impl.FormattedException: java.lang.RuntimeException: Could not execute entrypoint stage 'preLaunch' due to errors, provided by 'sodium'!
at net.fabricmc.loader.impl.FormattedException.ofLocalized(FormattedException.java:63)
at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:164)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:68)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
Caused by: java.lang.RuntimeException: Could not execute entrypoint stage 'preLaunch' due to errors, provided by 'sodium'!
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.lambda$invoke0$0(EntrypointUtils.java:51)
at net.fabricmc.loader.impl.util.ExceptionUtil.gatherExceptions(ExceptionUtil.java:33)
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke0(EntrypointUtils.java:49)
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke(EntrypointUtils.java:35)
at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:162)
... 2 more
Caused by: java.lang.ExceptionInInitializerError
at me.jellysquid.mods.sodium.client.util.workarounds.probe.GraphicsAdapterProbe.findAdapters(GraphicsAdapterProbe.java:26)
at me.jellysquid.mods.sodium.client.SodiumPreLaunch.onPreLaunch(SodiumPreLaunch.java:11)
at net.fabricmc.loader.impl.entrypoint.EntrypointUtils.invoke0(EntrypointUtils.java:47)
... 4 more
Caused by: java.lang.RuntimeException: Mixin transformation of net.minecraft.class_3532 failed
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:427)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.tryLoadClass(KnotClassDelegate.java:323)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.loadClass(KnotClassDelegate.java:218)
at net.fabricmc.loader.impl.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:112)
at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
at net.minecraft.class_156.method_28122(class_156.java:138)
at net.minecraft.class_156.(class_156.java:85)
... 7 more
Caused by: org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:392)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:234)
at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClassBytes(MixinTransformer.java:202)
at net.fabricmc.loader.impl.launch.knot.KnotClassDelegate.getPostMixinClassByteArray(KnotClassDelegate.java:422)
... 13 more
Caused by: java.lang.ClassCastException: class com.llamalad7.mixinextras.lib.apache.commons.tuple.ImmutablePair cannot be cast to class org.apache.commons.lang3.tuple.Pair (com.llamalad7.mixinextras.lib.apache.commons.tuple.ImmutablePair and org.apache.commons.lang3.tuple.Pair are in unnamed module of loader net.fabricmc.loader.impl.launch.knot.KnotClassLoader @5afa04c)
at ca.fxco.memoryleakfix.config.mixinExtension.UnMixinExtension.preApply(UnMixinExtension.java:23)
at org.spongepowered.asm.mixin.transformer.ext.Extensions.preApply(Extensions.java:156)
at org.spongepowered.asm.mixin.transformer.TargetClassContext.preApply(TargetClassContext.java:413)
at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:401)
at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363)
... 16 more

I don't have any idea why I can't run Sonance. Maybe, conflicts with any mod I have installed, but which one?

Could not execute entrypoint stage 'preLaunch' due to errors, provided by 'sodium'!

This is an error related to sodium, which isn't caused by M.R.U - you should report this to the Sodium developers.