Crash log:
---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 2025-10-22 15:43:42
Description: Rendering entity in world

java.lang.ClassCastException: class net.minecraft.class_11903 cannot be cast to class net.minecraft.class_742 (net.minecraft.class_11903 and net.minecraft.class_742 are in unnamed module of loader 'knot' @15bb6bea)
at knot//dev.tr7zw.notenoughanimations.renderlayer.SwordRenderLayer.submit(SwordRenderLayer.java:73)
at knot//dev.tr7zw.notenoughanimations.renderlayer.SwordRenderLayer.method_4199(SwordRenderLayer.java:38)
at knot//net.minecraft.class_922.method_4054(class_922.java:114)
at knot//net.minecraft.class_922.method_3936(class_922.java:40)
at knot//net.minecraft.class_898.method_72976(class_898.java:155)
at knot//net.minecraft.class_761.method_72916(class_761.java:842)
at knot//net.minecraft.class_761.method_62214(class_761.java:638)
at knot//net.minecraft.class_9909.method_61910(class_9909.java:67)
at knot//net.minecraft.class_761.method_22710(class_761.java:571)
at knot//net.minecraft.class_757.method_3188(class_757.java:773)
at knot//net.minecraft.class_757.method_3192(class_757.java:537)
at knot//net.minecraft.class_310.method_1523(class_310.java:1380)
at knot//net.minecraft.class_310.method_1514(class_310.java:969)
at knot//net.minecraft.client.main.Main.main(Main.java:250)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:506)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:72)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:105)
at org.prismlauncher.EntryPoint.listen(EntryPoint.java:129)
at org.prismlauncher.EntryPoint.main(EntryPoint.java:70)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Render thread
Stacktrace:
at knot//dev.tr7zw.notenoughanimations.renderlayer.SwordRenderLayer.submit(SwordRenderLayer.java:73)
at knot//dev.tr7zw.notenoughanimations.renderlayer.SwordRenderLayer.method_4199(SwordRenderLayer.java:38)
at knot//net.minecraft.class_922.method_4054(class_922.java:114)

-- EntityRenderState being rendered --
Details:
EntityRenderState: net.minecraft.class_10055
Entity's Exact location: -9467.72, 63.00, -1754.19
Stacktrace:
at knot//net.minecraft.class_898.method_72976(class_898.java:155)
at knot//net.minecraft.class_761.method_72916(class_761.java:842)
at knot//net.minecraft.class_761.method_62214(class_761.java:638)
at knot//net.minecraft.class_9909.method_61910(class_9909.java:67)
at knot//net.minecraft.class_761.method_22710(class_761.java:571)
at knot//net.minecraft.class_757.method_3188(class_757.java:773)
at knot//net.minecraft.class_757.method_3192(class_757.java:537)
at knot//net.minecraft.class_310.method_1523(class_310.java:1380)
at knot//net.minecraft.class_310.method_1514(class_310.java:969)
at knot//net.minecraft.client.main.Main.main(Main.java:250)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:506)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:72)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:105)
at org.prismlauncher.EntryPoint.listen(EntryPoint.java:129)
at org.prismlauncher.EntryPoint.main(EntryPoint.java:70)

-- Renderer details --
Details:
Assigned renderer: net.minecraft.class_1007@64ab366c
Stacktrace:
at knot//net.minecraft.class_898.method_68829(class_898.java:190)
at knot//net.minecraft.class_898.method_72976(class_898.java:183)
at knot//net.minecraft.class_761.method_72916(class_761.java:842)
at knot//net.minecraft.class_761.method_62214(class_761.java:638)
at knot//net.minecraft.class_9909.method_61910(class_9909.java:67)
at knot//net.minecraft.class_761.method_22710(class_761.java:571)
at knot//net.minecraft.class_757.method_3188(class_757.java:773)
at knot//net.minecraft.class_757.method_3192(class_757.java:537)
at knot//net.minecraft.class_310.method_1523(class_310.java:1380)
at knot//net.minecraft.class_310.method_1514(class_310.java:969)
at knot//net.minecraft.client.main.Main.main(Main.java:250)
at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:506)
at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:72)
at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23)
at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:105)
at org.prismlauncher.EntryPoint.listen(EntryPoint.java:129)
at org.prismlauncher.EntryPoint.main(EntryPoint.java:70)

-- Uptime --
Details:
JVM uptime: 77.192s
Wall uptime: 72.626s
High-res time: 71.525s
Client ticks: 1375 ticks / 68.750s

Reproduction:
/summon mannequin

What version of NEA are you on? This should be impossible on the latest version.

This is a Scabbard Sword related crash. This feature was fully removed in the latest NEA versions for 1.21.10.

Yep, just update NEA.