It all started when I went on an adventure. I went through a nether portal then built another one I went through the other one and on the other side was a village. Eventually I quit the game and found out there was a new launcher version available so when I came back I opened up the launcher and executed the version 19w8b. Then I went to the worlds menu and found the world I just played was loaded in 19w8a so I backed up the world and I was back in the nether, so I went through the portal again and shortly after the terrain loaded the game crashed while ticking entity or something. Here's the crash report.

---- Minecraft Crash Report ----
// Why did you do that?

Time: 2/23/19 12:46 AM
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
at ahw.a(SourceFile:1049)
at ahw.dD(SourceFile:1038)
at aic.dD(SourceFile:35)
at ahw.h(SourceFile:289)
at anw.h(SourceFile:573)
at aod.h(SourceFile:83)
at uv.a(SourceFile:565)
at bdf.a(SourceFile:683)
at uv.a(SourceFile:368)
at net.minecraft.server.MinecraftServer.b(SourceFile:837)
at net.minecraft.server.MinecraftServer.a(SourceFile:776)
at dtd.a(SourceFile:128)
at net.minecraft.server.MinecraftServer.run(SourceFile:634)
at java.lang.Thread.run(Thread.java:745)

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

– Head –
Thread: Server thread
Stacktrace:
at ahw.a(SourceFile:1049)
at ahw.dD(SourceFile:1038)
at aic.dD(SourceFile:35)
at ahw.h(SourceFile:289)
at anw.h(SourceFile:573)
at aod.h(SourceFile:83)
at uv.a(SourceFile:565)

– Entity being ticked –
Details:
Entity Type: minecraft:trader_llama (aod)
Entity ID: 769
Entity Name: Trader Llama
Entity's Exact location: 4717.63, 64.00, 2285.29
Entity's Block location: World: (4717,64,2285), Chunk: (at 13,4,13 in 294,142; contains blocks 4704,0,2272 to 4719,255,2287), Region: (9,4; contains chunks 288,128 to 319,159, blocks 4608,0,2048 to 5119,255,2559)
Entity's Momentum: 0.00, -0.08, 0.00
Entity's Passengers: []
Entity's Vehicle: ~_ERROR~ NullPointerException: null
Stacktrace:
at bdf.a(SourceFile:683)
at uv.a(SourceFile:368)

– Affected level –
Details:
Level name: New World
All players: 1 total; [uw['Eligaming363746'/418, l='New World', x=4784.00, y=77.54, z=2344.06]]
Chunk stats: ServerChunkCache: 3391
Level seed: -511658407220626
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options: {}
Level spawn location: World: (208,66,18), Chunk: (at 0,4,2 in 13,1; contains blocks 208,0,16 to 223,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 820819 game time, 226013 day time
Level dimension: -1
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 51206 (now: false), thunder time: 87847 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.b(SourceFile:837)
at net.minecraft.server.MinecraftServer.a(SourceFile:776)
at dtd.a(SourceFile:128)
at net.minecraft.server.MinecraftServer.run(SourceFile:634)
at java.lang.Thread.run(Thread.java:745)

– System Details –
Details:
Minecraft Version: 19w08b
Operating System: Mac OS X (x86_64) version 10.12.6
Java Version: 1.8.0_74, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 999847440 bytes (953 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB)
JVM Flags: 8 total; -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Player Count: 1 / 8; [uw['Eligaming363746'/418, l='New World', x=4784.00, y=77.54, z=2344.06]]
Data Packs: vanilla
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.