Joining servers crash minecraft.

I try and join a server and will either crash immediately after loading the server or a couple seconds after spawning into the server lobby. Idk if someone can help me fix this. This is the crash report

 

---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 11/21/19 7:36 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
    at it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap$MapIterator.nextEntry(Int2ObjectOpenHashMap.java:668)
    at it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap$EntryIterator.next(Int2ObjectOpenHashMap.java:742)
    at it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap$EntryIterator.next(Int2ObjectOpenHashMap.java:738)
    at net.minecraft.class_638.method_18116(class_638.java:126)
    at net.minecraft.class_310.method_1574(class_310.java:1433)
    at net.minecraft.class_310.method_1523(class_310.java:925)
    at net.minecraft.class_310.method_1514(class_310.java:410)
    at net.minecraft.client.main.Main.main(Main.java:155)
    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.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:170)
    at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:198)
    at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:26)

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

-- Head --
Thread: Client thread
Stacktrace:
    at it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap$MapIterator.nextEntry(Int2ObjectOpenHashMap.java:668)
    at it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap$EntryIterator.next(Int2ObjectOpenHashMap.java:742)
    at it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap$EntryIterator.next(Int2ObjectOpenHashMap.java:738)
    at net.minecraft.class_638.method_18116(class_638.java:126)

-- Affected level --
Details:
    All players: 1 total; [class_746['CaptainYoink'/906, l='MpServer', x=8.50, y=65.00, z=8.50]]
    Chunk stats: Client Chunk Cache: 18225, 66
    Level dimension: minecraft:overworld
    Level name: MpServer
    Level seed: 0
    Level generator: ID 00 - default, ver 1. Features enabled: false
    Level generator options: {}
    Level spawn location: World: (8,64,8), Chunk: (at 8,4,8 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: 0 game time, 0 day time
    Level storage version: 0x00000 - Unknown?
    Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
    Level game mode: Game mode: adventure (ID 2). Hardcore: false. Cheats: false
    Server brand: Paper
    Server type: Non-integrated multiplayer server
Stacktrace:
    at net.minecraft.class_638.method_8538(class_638.java:421)
    at net.minecraft.class_310.method_1587(class_310.java:1923)
    at net.minecraft.class_310.method_1514(class_310.java:430)
    at net.minecraft.client.main.Main.main(Main.java:155)
    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.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:170)
    at net.fabricmc.loader.launch.knot.Knot.init(Knot.java:198)
    at net.fabricmc.loader.launch.knot.KnotClient.main(KnotClient.java:26)

-- System Details --
Details:
    Minecraft Version: 1.14.4
    Minecraft Version ID: 1.14.4
    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: 1119156720 bytes (1067 MB) / 2013265920 bytes (1920 MB) up to 2147483648 bytes (2048 MB)
    CPUs: 4
    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
    Launched Version: 1.14.4-Aristois
    LWJGL: 3.2.2 build 10
    OpenGL: AMD Radeon(TM) Vega 8 Graphics GL version 4.6.13571 Compatibility Profile Context 19.9.2 26.20.13003.1007, ATI Technologies Inc.
    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: Very likely; Jar signature invalidated
    Type: Client (map_client.txt)
    Resource Packs: 
    Current Language: English (US)
    CPU: 4x AMD Ryzen 3 2200G with Radeon Vega Graphics