Game crashing constantly

Here is the crash report. It crash when i go in boat through the water.

---- Minecraft Crash Report ---- 
// Why did you do that?Time: 2/17/19 7:31 PM
Description: Tesselating liquid in worldjava.lang.NullPointerException: Tesselating liquid in world
	at dfj.b(SourceFile:15)
	at dfj.a(SourceFile:27)
	at dfj.c(SourceFile:46)
	at dgm.a(SourceFile:64)
	at dgl.a(SourceFile:78)
	at din.b(SourceFile:208)
	at dik.a(SourceFile:88)
	at dik.run(SourceFile:41)
	at java.lang.Thread.run(Unknown Source)
A detailed walkthrough of the error, its code path and all known details is as follows:
----------------------------------------------------------------------------------------- Head --
Thread: Client thread
Stacktrace:
	at dfj.b(SourceFile:15)
	at dfj.a(SourceFile:27)
	at dfj.c(SourceFile:46)
	at dgm.a(SourceFile:64)-- Block being tesselated --
Details:
	Block location: World: (16,48,-1312), Chunk: (at 0,3,0 in 1,-82; contains blocks 16,0,-1312 to 31,255,-1297), Region: (0,-3; contains chunks 0,-96 to 31,-65, blocks 0,0,-1536 to 511,255,-1025)
Stacktrace:
	at dgl.a(SourceFile:78)-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [dfe['xWinno'/175, l='MpServer', x=100.40, y=62.07, z=-1177.55]]
	Chunk stats: MultiplayerChunkCache: 625, 427
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: {}
	Level spawn location: World: (-48,63,-223), Chunk: (at 0,3,1 in -3,-14; contains blocks -48,0,-224 to -33,255,-209), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
	Level time: 2049848 game time, 3174643 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: survival (ID 0). Hardcore: false. Cheats: false
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at dct.a(SourceFile:466)
	at cqn.b(SourceFile:1894)
	at dik.run(SourceFile:47)
	at java.lang.Thread.run(Unknown Source)-- System Details --
Details:
	Minecraft Version: 19w07a
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_191, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 481715336 bytes (459 MB) / 2667053056 bytes (2543 MB) up to 5615124480 bytes (5355 MB)
	JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xms512m -Xmx6024m
	Launched Version: MultiMC5
	LWJGL: 3.2.1 build 12
	OpenGL: NO CONTEXT
	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: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: 
	Current Language: English (US)
	CPU: 4x Intel(R) Core(TM) i5-4430 CPU @ 3.00GHz
#@!@# Game crashed! Crash report saved to: #@!@# C:\Users\Winnie\Documents\MultiMC\instances\Snapshot\.minecraft\crash-reports\crash-2019-02-17_19.31.50-client.txt
AL lib: (EE) alc_cleanup: 1 device not closed
Process exited with code -1.
Clipboard copy at: 17 Feb 2019 19:31:57 +0100
MultiMC: Log upload triggered at: 17 Feb 2019 19:35:13 +0100