Minecraft forge crashes when loading
Andrew Vasquez
Updated on March 22, 2026

The game starts, loads everything, then the screen flashes as if it’s about to send me to the world, and the game itself says I joined (as seen in the game output), but immediately it says “Shutting down internal server” (which was when I knew something was wrong) and it crashes. Here’s what I get:
There are other answers below:
Minecraft Mods; Mods Discussion; HELP! my forge crashes when i try to load it up . 1.12 Forge. Search Search all Forums Search this Forum Search this Thread Tools Jump to Forum HELP! my forge crashes when i try to load it up #1 Sep 2, 2017. JJROCKS65. JJROCKS65.
Make sure you have the correct version of Forge installed (some packs are heavily dependent on one specific build of Forge) Make a launcher profile targeting this version of Forge. Set the launcher profile’s GameDir property to the pack’s instance folder (not the instances folder, the folder that has the pack’s name on it).
Then it loads for a while, and then it crashes. The mods i used were WorldEdit, BiomesO’Plenty, Mo’Creatures, and Twilight Forest. I have the latest java and 1.12.2 forge, and my jvm arguements are: -Xmx1250M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M. My Crash Report is: —- Minecraft Crash Report —-
Minecraft Forge crashes when loading So I have Minecraft Forge, just got it cause i wanted mods in the game, its version 1.12.2 and i got some mods, made sure they all lined up with the version and went to forge on the loading screen, clicked play and then a message popped up that said ‘Game Crash An unexpected issue occurred and the game has crashed we’re sorry for the …
Okay so basically I’m trying to download Minecraft forge 1.6.4 I did everything your supposed to do but yet every time I run the forge installation, it fails… I’m pretty sure it may be a Java issue but I have the latest version of Java, so I was wondering if someone knows where I can snag the pre-installed version folder containing forge?
Description: There was a severe problem during mod loading that has caused the game to fail net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from Forge Mod Loader (FML) Caused by: java.lang.NullPointerException at net.minecraftforge.fml.common.network.NetworkRegistry.newChannel(NetworkRegistry.java:207) …
the forge modloader crashes after a specific point. i dont know what to do. i reinstalled everything. Minecraft. Java. Mods. Deactivated antivirus and firewall just in case something is blocking. Allocated enough ram. And it doesnt matter which modpack i try to run. I can start minecraft without mods. no problems with that.
If you have no mods installed and only Minecraft Forge, it could mean that you did not install it correctly. Force an update on Minecraft and re-install Forge by following the exact steps. If you have mods installed, the error could be caused by conflicting mods, which are two mods that are not able to work if another one is installed. Most of the time, conflicting mods does not work …
Step 4: Tick the Turn off Windows Defender Firewall (not recommended) box under both the Private Network Settings and Public Network Settings sections. Then, click OK to save the changes. Step 5: Now, check if Minecraft Forge not working issue is fixed. If not, turn on Windows Defender Firewall with the above steps and try other troubleshooting …
Related Questions
How to fix forge not working on Minecraft?
Force an update on Minecraft and re-install Forge by following the exact steps. If you have mods installed, the error could be caused by conflicting mods, which are two mods that are not able to work if another one is installed.
How do I fix a broken forge mod that crashes?
Uninstall all of your mods (forcing an update is a good way, but you’ll need to re-install Forge) and re-install them all one by one. Once it crashes, you’ll be able to identify which mods is in conflict with another one. One of your options is to stop using one of the two mods.
What is Minecraft Forge and is it safe?
Minecraft Forge is a modding platform for Minecraft. Additionally, it tries to change or mod system files of the actual Minecraft game. Given to that fact, Forge can be detected as a malicious program by your Windows Defender Firewall.
How to use Minecraft Forge on Java?
Minecraft Forge, an open-source modding API and loader, is built to simplify compatibility across community-created games on Minecraft Java edition. Download and install it from the official website. Then copy and paste the files to the .minecraft/mods folder. After that, you can choose the Forge profile no matter when you run Minecraft.