Alexs mobs error loading javalang.reflect.InvocationTargetException: null

[Coolio]

I was trying to play alex's mobs but a screen popped up saying the mod had an error loading. New to using mods anyone know how to fix this? Thanks!

 

---- Minecraft Crash Report ----
// Don't be sad, have a hug! ❤️

Time: 8/25/22, 4:31 PM
Description: Mod loading error has occurred

java.lang.Exception: Mod Loading has failed
    at net.minecraftforge.logging.CrashReportExtender.dumpModLoadingCrashReport(CrashReportExtender.java:55) ~[forge-1.19-41.1.0-universal.jar%23150!/:?] {re:classloading}
    at net.minecraftforge.client.loading.ClientModLoader.completeModLoading(ClientModLoader.java:167) ~[forge-1.19-41.1.0-universal.jar%23150!/:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.lambda$new$1(Minecraft.java:561) ~[client-1.19-20220607.102129-srg.jar%23145!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.Util.m_137521_(Util.java:432) ~[client-1.19-20220607.102129-srg.jar%23145!/:?] {re:classloading}
    at net.minecraft.client.Minecraft.lambda$new$2(Minecraft.java:555) ~[client-1.19-20220607.102129-srg.jar%23145!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.gui.screens.LoadingOverlay.m_6305_(LoadingOverlay.java:135) ~[client-1.19-20220607.102129-srg.jar%23145!/:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.client.renderer.GameRenderer.m_109093_(GameRenderer.java:885) ~[client-1.19-20220607.102129-srg.jar%23145!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.m_91383_(Minecraft.java:1084) ~[client-1.19-20220607.102129-srg.jar%23145!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.Minecraft.m_91374_(Minecraft.java:669) ~[client-1.19-20220607.102129-srg.jar%23145!/:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.main.Main.main(Main.java:206) ~[client-1.19-20220607.102129-srg.jar%23145!/:?] {re:classloading,pl:runtimedistcleaner:A}
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?] {}
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
    at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?] {}
    at net.minecraftforge.fml.loading.targets.CommonClientLaunchHandler.lambda$launchService$0(CommonClientLaunchHandler.java:27) ~[fmlloader-1.19-41.1.0.jar%2393!/:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:30) [modlauncher-10.0.8.jar%2381!/:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:53) [modlauncher-10.0.8.jar%2381!/:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:71) [modlauncher-10.0.8.jar%2381!/:?] {}
    at cpw.mods.modlauncher.Launcher.run(Launcher.java:106) [modlauncher-10.0.8.jar%2381!/:?] {}
    at cpw.mods.modlauncher.Launcher.main(Launcher.java:77) [modlauncher-10.0.8.jar%2381!/:?] {}
    at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26) [modlauncher-10.0.8.jar%2381!/:?] {}
    at cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23) [modlauncher-10.0.8.jar%2381!/:?] {}
    at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:141) [bootstraplauncher-1.1.2.jar:?] {}

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

-- Head --
Thread: Render thread
Stacktrace:
    at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:141) ~[securejarhandler-2.1.4.jar:?] {}
-- MOD alexsmobs --
Details:
    Caused by 0: java.lang.reflect.InvocationTargetException
        at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] {}
        at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) ~[?:?] {}
        at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?] {}
        at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[?:?] {}
        at java.lang.reflect.Constructor.newInstance(Constructor.java:480) ~[?:?] {}
        at net.minecraftforge.fml.javafmlmod.FMLModContainer.constructMod(FMLModContainer.java:68) ~[javafmllanguage-1.19-41.1.0.jar%23147!/:?] {}
        at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$10(ModContainer.java:121) ~[fmlcore-1.19-41.1.0.jar%23146!/:?] {}
        at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804) ~[?:?] {}
        at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1796) ~[?:?] {}
        at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) ~[?:?] {}
        at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) ~[?:?] {}
        at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) ~[?:?] {}
        at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) ~[?:?] {}
        at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) ~[?:?] {}

    Caused by 1: java.lang.NoClassDefFoundError: net/minecraftforge/client/event/ParticleFactoryRegisterEvent
        at com.github.alexthe666.alexsmobs.AlexsMobs.<init>(AlexsMobs.java:84) ~[alexsmobs-1.19.0.jar%23143!/:1.19.0] {re:classloading}
        at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] {}
        at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) ~[?:?] {}
        at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?] {}
        at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[?:?] {}
        at java.lang.reflect.Constructor.newInstance(Constructor.java:480) ~[?:?] {}
        at net.minecraftforge.fml.javafmlmod.FMLModContainer.constructMod(FMLModContainer.java:68) ~[javafmllanguage-1.19-41.1.0.jar%23147!/:?] {}
        at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$10(ModContainer.java:121) ~[fmlcore-1.19-41.1.0.jar%23146!/:?] {}
        at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804) ~[?:?] {}
        at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1796) ~[?:?] {}
        at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) ~[?:?] {}
        at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) ~[?:?] {}
        at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) ~[?:?] {}
        at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) ~[?:?] {}
        at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) ~[?:?] {}

    Mod File: /C:/Users/I VAN HA/AppData/Roaming/.minecraft/mods/alexsmobs-1.19.0.jar
    Failure message: Alex's Mobs (alexsmobs) has failed to load correctly
        java.lang.reflect.InvocationTargetException: null
    Mod Version: 1.19.0
    Mod Issue URL: https://github.com/Alex-the-666/AlexsMobs/issues
    Exception message: java.lang.ClassNotFoundException: net.minecraftforge.client.event.ParticleFactoryRegisterEvent
Stacktrace:
    at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:141) ~[securejarhandler-2.1.4.jar:?] {}
    at java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[?:?] {}
    at com.github.alexthe666.alexsmobs.AlexsMobs.<init>(AlexsMobs.java:84) ~[alexsmobs-1.19.0.jar%23143!/:1.19.0] {re:classloading}
    at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] {}
    at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) ~[?:?] {}
    at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?] {}
    at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[?:?] {}
    at java.lang.reflect.Constructor.newInstance(Constructor.java:480) ~[?:?] {}
    at net.minecraftforge.fml.javafmlmod.FMLModContainer.constructMod(FMLModContainer.java:68) ~[javafmllanguage-1.19-41.1.0.jar%23147!/:?] {}
    at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$10(ModContainer.java:121) ~[fmlcore-1.19-41.1.0.jar%23146!/:?] {}
    at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804) ~[?:?] {}
    at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1796) ~[?:?] {}
    at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) ~[?:?] {}
    at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) ~[?:?] {}
    at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) ~[?:?] {}
    at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) ~[?:?] {}
    at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) ~[?:?] {}

-- System Details --
Details:
    Minecraft Version: 1.19
    Minecraft Version ID: 1.19
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 17.0.3, Microsoft
    Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
    Memory: 262588656 bytes (250 MiB) / 570425344 bytes (544 MiB) up to 2147483648 bytes (2048 MiB)
    CPUs: 4
    Processor Vendor: GenuineIntel
    Processor Name: Intel(R) Core(TM) i5-3470 CPU @ 3.20GHz
    Identifier: Intel64 Family 6 Model 58 Stepping 9
    Microarchitecture: Ivy Bridge (Client)
    Frequency (GHz): 3.19
    Number of physical packages: 1
    Number of physical CPUs: 4
    Number of logical CPUs: 4
    Graphics card #0 name: Intel(R) HD Graphics
    Graphics card #0 vendor: Intel Corporation (0x8086)
    Graphics card #0 VRAM (MB): 2071.23
    Graphics card #0 deviceId: 0x0152
    Graphics card #0 versionInfo: DriverVersion=10.18.10.4358
    Memory slot #0 capacity (MB): 4096.00
    Memory slot #0 clockSpeed (GHz): 1.60
    Memory slot #0 type: DDR3
    Virtual memory max (MB): 16206.54
    Virtual memory used (MB): 8885.14
    Swap memory total (MB): 12192.08
    Swap memory used (MB): 1682.14
    JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
    ModLauncher: 10.0.8+10.0.8+main.0ef7e830
    ModLauncher launch target: forgeclient
    ModLauncher naming: srg
    ModLauncher services: 
        mixin-0.8.5.jar mixin PLUGINSERVICE 
        eventbus-6.0.0.jar eventbus PLUGINSERVICE 
        fmlloader-1.19-41.1.0.jar slf4jfixer PLUGINSERVICE 
        fmlloader-1.19-41.1.0.jar object_holder_definalize PLUGINSERVICE 
        fmlloader-1.19-41.1.0.jar runtime_enum_extender PLUGINSERVICE 
        fmlloader-1.19-41.1.0.jar capability_token_subclass PLUGINSERVICE 
        accesstransformers-8.0.4.jar accesstransformer PLUGINSERVICE 
        fmlloader-1.19-41.1.0.jar runtimedistcleaner PLUGINSERVICE 
        modlauncher-10.0.8.jar mixin TRANSFORMATIONSERVICE 
        modlauncher-10.0.8.jar fml TRANSFORMATIONSERVICE 
    FML Language Providers: 
        [email protected]
        lowcodefml@null
        javafml@null
    Mod List: 
        client-1.19-20220607.102129-srg.jar               |Minecraft                     |minecraft                     |1.19                |COMMON_SET|Manifest: a1:d4:5e:04:4f:d3:d6:e0:7b:37:97:cf:77:b0:de:ad:4a:47:ce:8c:96:49:5f:0a:cf:8c:ae:b2:6d:4b:8a:3f
        forge-1.19-41.1.0-universal.jar                   |Forge                         |forge                         |41.1.0              |COMMON_SET|Manifest: 84:ce:76:e8:45:35:e4:0e:63:86:df:47:59:80:0f:67:6c:c1:5f:6e:5f:4d:b3:54:47:1a:9f:7f:ed:5e:f2:90
        citadel-1.12.7-1.19.jar                           |Citadel                       |citadel                       |1.12.7              |COMMON_SET|Manifest: NOSIGNATURE
        alexsmobs-1.19.0.jar                              |Alex's Mobs                   |alexsmobs                     |1.19.0              |ERROR     |Manifest: NOSIGNATURE
    Crash Report UUID: 31ead35b-87d8-431b-8391-ed266227ff6a
    FML: 41.1
    Forge: net.minecraftforge:41.1.0

[warjort]

Mod File: /C:/Users/I VAN HA/AppData/Roaming/.minecraft/mods/alexsmobs-1.19.0.jar
    Failure message: Alex's Mobs (alexsmobs) has failed to load correctly
        java.lang.reflect.InvocationTargetException: null
    Mod Version: 1.19.0
    Mod Issue URL: https://github.com/Alex-the-666/AlexsMobs/issues
    Exception message: java.lang.ClassNotFoundException: net.minecraftforge.client.event.ParticleFactoryRegisterEvent

Download the most recent mod file for your version of minecraft

https://www.curseforge.com/minecraft/mc-mods/alexs-mobs/files

if it still doesn't work, contact the mod author.