Crashing when joining world/server

---- Minecraft Crash Report ----

WARNING: coremods are present:
  ObfuscatePlugin (obfuscate-0.2.6-1.12.2.jar)
Contact their authors BEFORE contacting forge

// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 2/8/20 2:34 PM
Description: Unexpected error

java.lang.NoSuchFieldError: isRemote
    at realdrops.handlers.EventHandler.onEntityJoin(EventHandler.java:95)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_95_EventHandler_onEntityJoin_EntityJoinWorldEvent.invoke(.dynamic)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
    at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
    at net.minecraft.world.World.func_72897_h(World.java:3552)
    at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1820)
    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1098)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    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:
---------------------------------------------------------------------------------------

-- Head --
Thread: Client thread
Stacktrace:
    at realdrops.handlers.EventHandler.onEntityJoin(EventHandler.java:95)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_95_EventHandler_onEntityJoin_EntityJoinWorldEvent.invoke(.dynamic)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
    at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
    at net.minecraft.world.World.func_72897_h(World.java:3552)

-- Affected level --
Details:
    Level name: MpServer
    All players: 1 total; [EntityPlayerSP['PinkBananaDuck'/1, l='MpServer', x=3.50, y=78.00, z=0.50]]
    Chunk stats: MultiplayerChunkCache: 332, 332
    Level seed: 0
    Level generator: ID 02 - largeBiomes, ver 0. Features enabled: false
    Level generator options: 
    Level spawn location: World: (0,70,0), Chunk: (at 0,4,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
    Level time: 6895776 game time, 26759 day time
    Level dimension: 0
    Level storage version: 0x00000 - Unknown?
    Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
    Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
    Forced entities: 47 total; [EntityPainting['Painting'/177, l='MpServer', x=90.00, y=74.50, z=-90.97], EntityPainting['Painting'/181, l='MpServer', x=98.97, y=73.00, z=-119.00], EntityPainting['Painting'/5719, l='MpServer', x=-113.97, y=72.50, z=-133.50], EntityWolf['Wolf'/131, l='MpServer', x=24.58, y=71.00, z=-26.36], EntityPainting['Painting'/5720, l='MpServer', x=-113.50, y=72.50, z=-141.03], EntityPainting['Painting'/5746, l='MpServer', x=-112.00, y=74.00, z=-134.97], EntityPainting['Painting'/5747, l='MpServer', x=-107.97, y=73.00, z=-140.50], EntityPainting['Painting'/45, l='MpServer', x=-112.50, y=75.50, z=-115.97], EntitySheep['Sheep'/151, l='MpServer', x=38.81, y=71.00, z=68.34], EntityPainting['Painting'/46, l='MpServer', x=-115.00, y=73.00, z=-124.03], EntityPainting['Painting'/47, l='MpServer', x=-117.00, y=74.00, z=-120.03], EntityPainting['Painting'/48, l='MpServer', x=-112.03, y=74.00, z=-128.00], EntityPainting['Painting'/49, l='MpServer', x=-112.03, y=74.00, z=-126.00], EntityPainting['Painting'/50, l='MpServer', x=-117.97, y=74.00, z=-126.00], EntityPainting['Painting'/51, l='MpServer', x=-117.97, y=74.00, z=-128.00], EntityPainting['Painting'/52, l='MpServer', x=-117.97, y=73.00, z=-122.00], EntityItemFrame['entity.ItemFrame.name'/158, l='MpServer', x=56.03, y=72.50, z=-91.50], EntityItemFrame['entity.ItemFrame.name'/159, l='MpServer', x=56.03, y=72.50, z=-87.50], EntityPainting['Painting'/61, l='MpServer', x=-107.97, y=75.50, z=-120.50], EntityItemFrame['entity.ItemFrame.name'/160, l='MpServer', x=54.97, y=72.50, z=-87.50], EntityPainting['Painting'/95, l='MpServer', x=-83.03, y=74.00, z=-125.00], EntityItemFrame['entity.ItemFrame.name'/161, l='MpServer', x=54.97, y=72.50, z=-91.50], EntityPainting['Painting'/96, l='MpServer', x=-83.03, y=74.00, z=-122.00], EntitySheep['Sheep'/162, l='MpServer', x=51.50, y=71.00, z=61.50], EntityPainting['Painting'/97, l='MpServer', x=-86.50, y=72.50, z=-114.97], EntityChicken['Chicken'/163, l='MpServer', x=53.50, y=71.00, z=63.50], EntityPainting['Painting'/98, l='MpServer', x=-85.00, y=73.50, z=-126.97], EntityItemFrame['entity.ItemFrame.name'/100, l='MpServer', x=-84.50, y=71.50, z=-125.97], EntityChicken['Chicken'/164, l='MpServer', x=53.50, y=71.00, z=65.50], EntityPainting['Painting'/99, l='MpServer', x=-86.50, y=73.50, z=-126.97], EntityItemFrame['entity.ItemFrame.name'/101, l='MpServer', x=-86.50, y=72.50, z=-96.97], EntityItemFrame['entity.ItemFrame.name'/102, l='MpServer', x=-87.50, y=71.50, z=-96.97], EntityItemFrame['entity.ItemFrame.name'/103, l='MpServer', x=-85.50, y=72.50, z=-93.03], EntityItemFrame['entity.ItemFrame.name'/104, l='MpServer', x=-85.50, y=71.50, z=-93.03], EntityItemFrame['entity.ItemFrame.name'/105, l='MpServer', x=-85.97, y=71.50, z=-94.50], EntityPainting['Painting'/106, l='MpServer', x=-87.00, y=73.00, z=-92.03], EntityPainting['Painting'/107, l='MpServer', x=-83.00, y=73.00, z=-80.03], EntityPainting['Painting'/108, l='MpServer', x=-86.00, y=73.00, z=-84.97], EntityPainting['Painting'/109, l='MpServer', x=-82.03, y=73.50, z=-83.00], EntityPainting['Painting'/110, l='MpServer', x=-85.03, y=72.50, z=-95.50], EntityBat['Bat'/3123, l='MpServer', x=-74.25, y=61.93, z=-67.48], EntityBat['Bat'/3124, l='MpServer', x=-75.57, y=61.89, z=-74.52], EntityItemFrame['entity.ItemFrame.name'/53, l='MpServer', x=-121.03, y=71.50, z=-90.50], EntityArmorStand['Armor Stand'/119, l='MpServer', x=-26.50, y=71.00, z=-94.50], EntityPainting['Painting'/171, l='MpServer', x=75.03, y=73.00, z=-120.00], EntityPainting['Painting'/175, l='MpServer', x=88.50, y=73.50, z=-118.03], EntityPainting['Painting'/176, l='MpServer', x=85.03, y=73.00, z=-92.00]]
    Retry entities: 0 total; []
    Server brand: fml,forge
    Server type: Non-integrated multiplayer server
Stacktrace:
    at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:532)
    at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2741)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:427)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    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)

-- System Details --
Details:
    Minecraft Version: 1.12.2
    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: 388511136 bytes (370 MB) / 738197504 bytes (704 MB) up to 6442450944 bytes (6144 MB)
    JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx6G -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 9.42 Powered by Forge 14.23.5.2847 Optifine OptiFine_1.12.2_HD_U_F5 10 mods loaded, 10 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

    | State  | ID               | Version      | Source                                | Signature |
    |:------ |:---------------- |:------------ |:------------------------------------- |:--------- |
    | LCHIJA | minecraft        | 1.12.2       | minecraft.jar                         | None      |
    | LCHIJA | mcp              | 9.42         | minecraft.jar                         | None      |
    | LCHIJA | FML              | 8.0.99.99    | forge-1.12.2-14.23.5.2847.jar         | None      |
    | LCHIJA | forge            | 14.23.5.2847 | forge-1.12.2-14.23.5.2847.jar         | None      |
    | LCHIJA | obfuscate        | 0.2.6        | minecraft.jar                         | None      |
    | LCHIJA | cdm              | 0.4.1        | device-mod-0.4.1-1.12.2.jar           | None      |
    | LCHIJA | cgm              | 0.15.3       | guns-0.15.3-1.12.2.jar                | None      |
    | LCHIJA | moreplayermodels | 1.12.2       | MorePlayerModels_1.12.2-(05Dec19).jar | None      |
    | LCHIJA | realdrops        | 1.2.14       | RealisticItemDrops-deobf-1.2.14.jar   | None      |
    | LCHIJA | vehicle          | 0.41.1       | vehicle-mod-0.41.1-1.12.2.jar         | None      |

    Loaded coremods (and transformers): 
ObfuscatePlugin (obfuscate-0.2.6-1.12.2.jar)
  com.mrcrayfish.obfuscate.asm.ObfuscateTransformer
    GL info: ' Vendor: 'Intel' Version: '3.1.0 - Build 9.17.10.4459' Renderer: 'Intel(R) HD Graphics 2000'
    Launched Version: 1.12.2-forge1.12.2-14.23.5.2847
    LWJGL: 2.9.4
    OpenGL: Intel(R) HD Graphics 2000 GL version 3.1.0 - Build 9.17.10.4459, Intel
    GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

    Using VBOs: Yes
    Is Modded: Definitely; Client brand changed to 'fml,forge'
    Type: Client (map_client.txt)
    Resource Packs: 
    Current Language: English (US)
    Profiler Position: N/A (disabled)
    CPU: 4x Intel(R) Core(TM) i3-2120 CPU @ 3.30GHz
    OptiFine Version: OptiFine_1.12.2_HD_U_F5
    OptiFine Build: 20191204-141934
    Render Distance Chunks: 8
    Mipmaps: 4
    Anisotropic Filtering: 1
    Antialiasing: 0
    Multitexture: false
    Shaders: null
    OpenGlVersion: 3.1.0 - Build 9.17.10.4459
    OpenGlRenderer: Intel(R) HD Graphics 2000
    OpenGlVendor: Intel
    CpuCount: 4