java.lang.RuntimeException: Could not execute entrypoint stage 'client' due to errors, provided by 'notenoughanimations' at 'dev.tr7zw.notenoughanimations.NEAnimationsMod'!
at net.fabricmc.loader.impl.FabricLoaderImpl.lambda$invokeEntrypoints$2(FabricLoaderImpl.java:403)
at net.fabricmc.loader.impl.util.ExceptionUtil.gatherExceptions(ExceptionUtil.java:33)
at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:401)
at net.fabricmc.loader.impl.game.minecraft.Hooks.startClient(Hooks.java:53)
at knot//net.minecraft.class_310.(class_310.java:476)
at knot//net.minecraft.client.main.Main.main(Main.java:250)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:480)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:100)
at org.prismlauncher.EntryPoint.listen(EntryPoint.java:129)
at org.prismlauncher.EntryPoint.main(EntryPoint.java:70)
Caused by: java.lang.NoSuchMethodError: 'java.lang.Object net.minecraft.class_7922.method_10223(net.minecraft.class_2960)'
at knot//dev.tr7zw.notenoughanimations.util.NMSHelper.getItem(NMSHelper.java:92)
at knot//dev.tr7zw.notenoughanimations.logic.HeldItemHandler.(HeldItemHandler.java:44)
at knot//dev.tr7zw.notenoughanimations.NEAnimationsLoader.enable(NEAnimationsLoader.java:54)
at knot//dev.tr7zw.notenoughanimations.NEAnimationsLoader.onEnable(NEAnimationsLoader.java:49)
at knot//dev.tr7zw.notenoughanimations.NEAnimationsMod.onInitializeClient(NEAnimationsMod.java:11)
at net.fabricmc.loader.impl.FabricLoaderImpl.invokeEntrypoints(FabricLoaderImpl.java:399)
... 9 more

here's some attached logs, good luck !
https://mclo.gs/A5iBfKg

Download the correct version. Prism messes up and downloads for 1.21.0 instead of 1.21.5/1.21.4.

as simple as that, thank your for that instant answer you're awesome !

I had a bunch of reports of that the past weeks. Not sure whats going on with Prism, as other launchers don't seem to have the issue, and I can't see anything wrong with the files on Modrinth either.