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Forge 52.0 Minecraft 1.21.1

Paint_Ninja

By Paint_Ninja
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Paint_Ninja World Shaper

Paint_Ninja

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Forge version: 52.0.0
Minecraft version: 1.21.1

Downloads:

Note that as this is the start of a new version, it is recommended that you check the downloads page and use the latest version to receive any bug fixes, as the first ever build of Forge for any MC version is usually buggy.

Intro:

The first build for Forge 1.21.1 has been released! It is based on 51.0.33 for 1.21.0.

We expect most existing 1.21.0 mods to work on 1.21.1 without needing any changes, as the only notable differences from Vanilla 1.21.0 -> 1.21.1 are a couple of new languages and a bugfix for an exploit that could be used to crash servers... as such, we strongly encourage all 1.21.0 players and mod developers to move to 1.21.1. From a mod dev perspective, BlockEntities now validate their block during construction - as long as that's fine you should be good to go.

1.21.0 has been moved to our minimal support tier, as explained in our tiered support policy - use 1.21.1 instead.

If you find any issues, please let us know on the Discord.

Sidenote:

I'm sorry for not making these release posts for Forge betas of the past few MC versions. While I forgot to make some posts, we still released Forge builds for newer MC. When in doubt, check the sidebar on the files site. Same-day ports of Forge to new MC versions are common.

Official Forge Discord server | Support FAQ for players

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    • Roshby23
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      I'm testing a modpack for a server, and everything is fine, until I update the Aether mod from version "aether-1.20.1-1.4.2-neoforge" to version "aether-1.20.1-1.5.1-neoforge" now on the server it gives the error: Failed to load datapacks, can't proceed with server load. You can either fix your datapacks or reset to vanilla with --safeMode but in the game it says something different (scroll down) [21Nov2024 15:58:50.673] [main/WARN] [net.minecraft.server.Main/]: Failed to load datapacks, can't proceed with server load. You can either fix your datapacks or reset to vanilla with --safeMode 2002java.util.concurrent.ExecutionException: java.lang.IllegalStateException: Failed to load registries due to above errors 2003at java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:396) ~[?:?] 2004at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2073) ~[?:?] 2005at net.minecraft.server.Main.main(Main.java:195) ~[server-1.20.1-20230612.114412-srg.jar%23535!/:?] 2006at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] 2007at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] 2008at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] 2009at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] 2010at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.runTarget(CommonLaunchHandler.java:111) ~[fmlloader-1.20.1-47.3.12.jar%2369!/:?] 2011at net.minecraftforge.fml.loading.targets.CommonLaunchHandler.serverService(CommonLaunchHandler.java:103) ~[fmlloader-1.20.1-47.3.12.jar%2369!/:?] 2012at net.minecraftforge.fml.loading.targets.CommonServerLaunchHandler.lambda$makeService$0(CommonServerLaunchHandler.java:27) ~[fmlloader-1.20.1-47.3.12.jar%2369!/:?] 2013at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30) ~[modlauncher-10.0.9.jar%2355!/:?] 2014at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) ~[modlauncher-10.0.9.jar%2355!/:?] 2015at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) ~[modlauncher-10.0.9.jar%2355!/:?] 2016at cpw.mods.modlauncher.Launcher.run(Launcher.java:108) ~[modlauncher-10.0.9.jar%2355!/:?] 2017at cpw.mods.modlauncher.Launcher.main(Launcher.java:78) ~[modlauncher-10.0.9.jar%2355!/:?] 2018at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) ~[modlauncher-10.0.9.jar%2355!/:?] 2019at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) ~[modlauncher-10.0.9.jar%2355!/:?] 2020at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141) ~[bootstraplauncher-1.1.2.jar:?] 2021Caused by: java.lang.IllegalStateException: Failed to load registries due to above errors 2022at net.minecraft.resources.RegistryDataLoader.m_247207_(RegistryDataLoader.java:77) ~[server-1.20.1-20230612.114412-srg.jar%23535!/:?] 2023at net.minecraft.server.WorldLoader.m_246152_(WorldLoader.java:54) ~[server-1.20.1-20230612.114412-srg.jar%23535!/:?] 2024at net.minecraft.server.WorldLoader.m_245736_(WorldLoader.java:58) ~[server-1.20.1-20230612.114412-srg.jar%23535!/:?] 2025at net.minecraft.server.WorldLoader.m_214362_(WorldLoader.java:31) ~[server-1.20.1-20230612.114412-srg.jar%23535!/:?] 2026at net.minecraft.server.Main.lambda$main$2(Main.java:167) ~[server-1.20.1-20230612.114412-srg.jar%23535!/:?] 2027at net.minecraft.Util.m_214652_(Util.java:777) ~[server-1.20.1-20230612.114412-srg.jar%23535!/:?] 2028at net.minecraft.Util.m_214679_(Util.java:772) ~[server-1.20.1-20230612.114412-srg.jar%23535!/:?] 2029at net.minecraft.server.Main.main(Main.java:166) ~[server-1.20.1-20230612.114412-srg.jar%23535!/:?] 2030... 15 more   AND THE ERROR THAT THE GAME SAY WENT I WANT TO PLAY IN SOLO (local): Time: 2024-11-21 16:16:37 Description: mouseClicked event handler java.lang.IllegalStateException: Failed to load registries due to above errors     at net.minecraft.resources.RegistryDataLoader.m_247207_(RegistryDataLoader.java:77) ~[client-1.20.1-20230612.114412-srg.jar%23652!/:?] {re:mixin,pl:connector_pre_launch:A,re:classloading,pl:mixin:APP:bclib.mixins.common.json:RegistryDataLoaderMixin from mod bclib,pl:mixin:APP:lithostitched.mixins.json:common.RegistryDataLoaderMixin from mod lithostitched,pl:mixin:APP:zeta.mixins.json:RegistryDataLoaderMixin from mod zeta,pl:mixin:APP:fabric-registry-sync-v0.mixins.json:RegistryLoaderMixin from mod fabric_registry_sync_v0,pl:mixin:APP:together.mixins.common.json:RegistryDataLoaderMixin from mod bclib,pl:mixin:APP:connectormod.mixins.json:registries.RegistryDataLoaderMixin from mod connectormod,pl:mixin:A,pl:connector_pre_launch:A} at net.minecraft.server.WorldLoader.m_246152_(WorldLoader.java:54) ~[client-1.20.1-20230612.114412-srg.jar%23652!/:?] {re:mixin,pl:connector_pre_launch:A,re:classloading,pl:mixin:APP:together.mixins.common.json:WorldLoaderMixin from mod bclib,pl:mixin:A,pl:connector_pre_launch:A}     at net.minecraft.server.WorldLoader.m_245736_(WorldLoader.java:58) ~[client-1.20.1-20230612.114412-srg.jar%23652!/:?] {re:mixin,pl:connector_pre_launch:A,re:classloading,pl:mixin:APP:together.mixins.common.json:WorldLoaderMixin from mod bclib,pl:mixin:A,pl:connector_pre_launch:A}     at net.minecraft.server.WorldLoader.m_214362_(WorldLoader.java:31) ~[client-1.20.1-20230612.114412-srg.jar%23652!/:?] {re:mixin,pl:connector_pre_launch:A,re:classloading,pl:mixin:APP:together.mixins.common.json:WorldLoaderMixin from mod bclib,pl:mixin:A,pl:connector_pre_launch:A}     at net.minecraft.client.gui.screens.worldselection.CreateWorldScreen.m_232896_(CreateWorldScreen.java:125) ~[client-1.20.1-20230612.114412-srg.jar%23652!/:?] {re:mixin,pl:accesstransformer:B,pl:connector_pre_launch:A,pl:runtimedistcleaner:A,re:classloading,pl:accesstransformer:B,pl:mixin:APP:modernfix-common.mixins.json:perf.dedicated_reload_executor.CreateWorldScreenMixin from mod modernfix,pl:mixin:APP:modernfix-forge.mixins.json:bugfix.extra_experimental_screen.CreateWorldScreenMixin from mod modernfix,pl:mixin:APP:cumulus_menus.mixins.json:client.accessor.CreateWorldScreenAccessor from mod cumulus_menus,pl:mixin:APP:mediumcore.mixins.json:client.CreateWorldScreenMixin from mod mediumcore,pl:mixin:APP:aether.mixins.json:client.CreateWorldScreenMixin from mod aether,pl:mixin:APP:together.mixins.client.json:CreateWorldScreen_Mixin from mod bclib,pl:mixin:APP:fancymenu.mixins.json:client.MixinCreateWorldScreen from mod fancymenu,pl:mixin:A,pl:connector_pre_launch:A,pl:runtimedistcleaner:A}        

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