Crash: java.lang.NullPointerException: Unexpected error

Moderator Note

We need to see your full launcher log, which is created in the game directory.
On your launcher, after your game has crashed, click "Launch options", and click the instance you are using. Then, click the small green arrow in the "Game directory" line. In the folder that opens, locate the launcher_log file, and upload it to this ticket.

when trying to enter a world, the game crash, work fine on stable version (like the 1.13)

19w09a\: [^crash-2019-03-13_16.13.30-client.txt]

---- Minecraft Crash Report ----
// You're mean.

Time: 13/03/19 16:13
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
	at cqx.n(SourceFile:1377)
	at cqx.d(SourceFile:922)
	at cqx.b(SourceFile:412)
	at net.minecraft.client.main.Main.main(SourceFile:154)


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

-- Head --
Thread: Client thread
Stacktrace:
	at ddj.a(SourceFile:449)

-- Affected level --
Details:
	Level name: MpServer
	All players: 0 total; []
	Chunk stats: MultiplayerChunkCache: 289, 0
	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: 214 game time, 214 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: ~~ERROR~~ NullPointerException: null
	Server type: Non-integrated multiplayer server
Stacktrace:
	at ddj.a(SourceFile:449)
	at cqx.b(SourceFile:1920)
	at cqx.b(SourceFile:425)
	at net.minecraft.client.main.Main.main(SourceFile:154)

-- System Details --
Details:
	Minecraft Version: 19w09a
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.8.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 425020080 bytes (405 MB) / 704643072 bytes (672 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=16M
	Launched Version: 19w09a
	LWJGL: 3.2.1 build 12
	OpenGL: GeForce GTX 850M/PCIe/SSE2 GL version 4.6.0 NVIDIA 391.35, NVIDIA Corporation
	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) i5-4210H CPU @ 2.90GHz