Tesselating liquid in world - NullPointerException

---- Minecraft Crash Report ----
// Why is it breaking :(

Time: 13/02/19 18:17
Description: Tesselating liquid in world

java.lang.NullPointerException: Tesselating liquid in world
	at dfj.b(SourceFile:15)
	at dfj$$Lambda$2620/478244284.getColor(Unknown Source)
	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(Thread.java:745)


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$$Lambda$2620/478244284.getColor(Unknown Source)
	at dfj.a(SourceFile:27)
	at dfj.c(SourceFile:46)
	at dgm.a(SourceFile:64)

-- Block being tesselated --
Details:
	Block location: World: (-5186,50,-35936), Chunk: (at 14,3,0 in -325,-2246; contains blocks -5200,0,-35936 to -5185,255,-35921), Region: (-11,-71; contains chunks -352,-2272 to -321,-2241, blocks -5632,0,-36352 to -5121,255,-35841)
Stacktrace:
	at dgl.a(SourceFile:78)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [dfe['Oval'/202, l='MpServer', x=-5322.34, y=68.32, z=-36023.31]]
	Chunk stats: MultiplayerChunkCache: 625, 7865
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: {}
	Level spawn location: World: (112,65,96), Chunk: (at 0,4,0 in 7,6; contains blocks 112,0,96 to 127,255,111), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 36575 game time, 36575 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
	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(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 19w07a
	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: 285329936 bytes (272 MB) / 1073741824 bytes (1024 MB) up to 1073741824 bytes (1024 MB)
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Launched Version: 19w07a
	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: vanilla, file/MC-143983
	Current Language: English (US)
	CPU: 4x AMD Athlon(tm) X4 760K Quad Core Processor