Everything was working great until my son accidentally added a mod for a different version. That is when forge started crashing. We removed the mod and the all the mods, but, the problem persists. What do i need to do to fix this issue?

 

Crash Report 

Spoiler

---- Minecraft Crash Report ----
// On the bright side, I bought you a teddy bear!

Time: 12/15/18 8:40 PM
Description: There was a severe problem during mod loading that has caused the game to fail

net.minecraftforge.fml.common.LoaderExceptionModCrash: Caught exception from mercurius_updater (mercurius_updater)
Caused by: java.lang.IllegalArgumentException: URI can't be null.
    at sun.net.spi.DefaultProxySelector.select(DefaultProxySelector.java:147)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1098)
    at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:988)
    at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:986)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessController.doPrivileged(AccessController.java:713)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:985)
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:932)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1512)
    at sun.net.www.protocol.http.HttpURLConnection.access$200(HttpURLConnection.java:90)
    at sun.net.www.protocol.http.HttpURLConnection$9.run(HttpURLConnection.java:1432)
    at sun.net.www.protocol.http.HttpURLConnection$9.run(HttpURLConnection.java:1430)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessController.doPrivileged(AccessController.java:713)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1429)
    at net.minecraftforge.mercurius.updater.Utils.downloadString(Utils.java:105)
    at net.minecraftforge.mercurius.updater.Utils.getMavenText(Utils.java:283)
    at net.minecraftforge.mercurius.updater.Utils.getRemoteChecksum(Utils.java:274)
    at net.minecraftforge.mercurius.updater.Utils.updateMavenFile(Utils.java:511)
    at net.minecraftforge.mercurius.updater.Utils.updateMercurius(Utils.java:327)
    at net.minecraftforge.mercurius.updater.MercuriusUpdaterMod.preInit(MercuriusUpdaterMod.java:41)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraftforge.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:641)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:246)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:224)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
    at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
    at com.google.common.eventbus.EventBus.post(EventBus.java:275)
    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:147)
    at net.minecraftforge.fml.common.Loader.preinitializeMods(Loader.java:647)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:275)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:440)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:352)
    at net.minecraft.client.main.Main.main(SourceFile:124)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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

-- System Details --
Details:
    Minecraft Version: 1.11.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 863923272 bytes (823 MB) / 1073741824 bytes (1024 MB) up to 4294967296 bytes (4096 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.38 Powered by Forge 13.20.0.2259 7 mods loaded, 7 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
    UCH    minecraft{1.11.2} [Minecraft] (minecraft.jar) 
    UCH    mcp{9.19} [Minecraft Coder Pack] (minecraft.jar) 
    UCH    FML{8.0.99.99} [Forge Mod Loader] (forge-1.11.2-13.20.0.2259.jar) 
    UCH    forge{13.20.0.2259} [Minecraft Forge] (forge-1.11.2-13.20.0.2259.jar) 
    UCE    mercurius_updater{1.0} [mercurius_updater] (MercuriusUpdater-1.11.2.jar) 
    UCH    customnpcs{1.11.2} [CustomNPCs] (CustomNPCs_1.11.2(10may17).jar) 
    UCH    howlingmoon{0.6.1} [Howling Moon Rising] (howlingmoon-1.11.2-0.6.1.jar) 
    Loaded coremods (and transformers): 
    GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 388.13' Renderer: 'GeForce GTX 1050 Ti/PCIe/SSE2'

 

Try removing Mercurius Updater

Edited December 16, 20186 yr by Cadiboo