If you know how to solve this please let me know. All I did was put a chest over a hopper and it crashed shortly after. A block may have went in the hopper, not sure.
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Minecraft Crash Report ----
// Oops.
Time: 12/03/19 3:36 PM
Description: Ticking block entity
java.lang.IllegalArgumentException: Cannot get property brw{name=enabled, clazz=class java.lang.Boolean, values=[true, false]} as it does not exist in Block{minecraft:chest}
at brd.c(SourceFile:95)
at bpw.a(SourceFile:118)
at bpw.g(SourceFile:109)
at bdf.I(SourceFile:635)
at uv.a(SourceFile:387)
at net.minecraft.server.MinecraftServer.b(SourceFile:837)
at net.minecraft.server.MinecraftServer.a(SourceFile:776)
at dtc.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 brd.c(SourceFile:95)
at bpw.a(SourceFile:118)
at bpw.g(SourceFile:109)
– Block entity being ticked –
Details:
Name: minecraft:hopper // bpw
Block: Block{minecraft:chest}[facing=west,type=single,waterlogged=false]
Block location: World: (-244,62,-331), Chunk: (at 12,3,5 in -16,-21; contains blocks -256,0,-336 to -241,255,-321), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Block: Block{minecraft:chest}[facing=west,type=single,waterlogged=false]
Block location: World: (-244,62,-331), Chunk: (at 12,3,5 in -16,-21; contains blocks -256,0,-336 to -241,255,-321), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Stacktrace:
at bdf.I(SourceFile:635)
at uv.a(SourceFile:387)
– Affected level –
Details:
Level name: Soviet Union
All players: 1 total; [uw['komarovgod'/221, l='Soviet Union', x=-244.82, y=62.00, z=-329.80]]
Chunk stats: ServerChunkCache: 2857
Level seed: -1712847449
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options: {}
Level spawn location: World: (-215,63,223), Chunk: (at 9,3,15 in -14,13; contains blocks -224,0,208 to -209,255,223), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 900842 game time, 1543340 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 147230 (now: false), thunder time: 58199 (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 dtc.a(SourceFile:128)
at net.minecraft.server.MinecraftServer.run(SourceFile:634)
at java.lang.Thread.run(Thread.java:745)
– System Details –
Details:
Minecraft Version: 19w09a
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: 1000769472 bytes (954 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB)
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
Player Count: 1 / 8; [uw['komarovgod'/221, l='Soviet Union', x=-244.82, y=62.00, z=-329.80]]
Data Packs: vanilla
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.
(I'm not sure how to screenshot but this is what it said, sorry)
Thanks. Turns out as MC-145160 apparently. We don't have much information yet on this issue

Thank you. When you get more information on the issue, let me know.
Please attach the crash report