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This always happens when i try creating a world or joining a server in 1.9.4 of Minecraft

Crash Log :

---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 5/17/16 9:53 PM
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at bkr.n(SourceFile:290)
at bkr.e(SourceFile:269)
at bcd.t(SourceFile:1559)
at bcd.av(SourceFile:969)
at bcd.a(SourceFile:399)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:310)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:395)
at org.multimc.EntryPoint.listen(EntryPoint.java:170)
at org.multimc.EntryPoint.main(EntryPoint.java:54)

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

-- Head --
Thread: Client thread
Stacktrace:
at bkr.n(SourceFile:290)
at bkr.e(SourceFile:269)

-- Affected level --
Details:
Level name: MpServer
All players: 0 total; []
Chunk stats: MultiplayerChunkCache: 0, 0
Level seed: 0
Level generator: ID 01 - flat, ver 0. 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: 0 game time, 0 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: true), thunder time: 0 (now: false)
Level game mode: Game mode: adventure (ID 2). Hardcore: false. Cheats: false
Forced entities: 0 total; []
Retry entities: 0 total; []
Server brand: ~~ERROR~~ NullPointerException: null
Server type: Non-integrated multiplayer server
Stacktrace:
at bks.a(SourceFile:365)
at bcd.b(SourceFile:2521)
at bcd.a(SourceFile:413)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:310)
at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:395)
at org.multimc.EntryPoint.listen(EntryPoint.java:170)
at org.multimc.EntryPoint.main(EntryPoint.java:54)

-- System Details --
Details:
Minecraft Version: 1.9.4
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 342722928 bytes (326 MB) / 519110656 bytes (495 MB) up to 1307574272 bytes (1247 MB)
JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xms512m -Xmx1290m
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: MultiMC5
LWJGL: 2.9.1
OpenGL: GeForce GTS 450/PCIe/SSE2 GL version 4.5.0 NVIDIA 365.19, 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)
Profiler Position: N/A (disabled)
CPU: [email protected]

P.S I'm using MultiMC as an alternative Minecraft launcher and tried enabling vsync with no luck

Guys please share and help me fix this :(, i can't play most of my favorite servers running 1.9.4 T_T