J'ai créer un serveur et il crash a a chaque connection

Bonjour
J'ai crée un serveur minecraft il y a peu, ces n'est pas le premier et celui-ci a chaque connexion que ce sois moi ou un ami il crash. se n'est pas un problème de RAM ma tour a 20 GO ma connexion internet est bonne d'autre serveur qui son aussi sur mon ordinateur fonctionne.
merci de tenter de trouver une réponse.
ps ce qui peu aider.
---- Minecraft Crash Report ----
// But it works on my machine.

Time: 06/03/16 17:17
Description: Ticking screen

java.lang.NullPointerException: Ticking screen
at ek$a.a(SourceFile:387)
at ek.m(SourceFile:220)
at ek.a(SourceFile:229)
at bkz.a(SourceFile:251)
at bgr.e(SourceFile:118)
at bcf.t(SourceFile:1590)
at bcf.av(SourceFile:962)
at bcf.a(SourceFile:392)
at net.minecraft.client.main.Main.main(SourceFile:124)


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

-- Head --
Stacktrace:
at ek$a.a(SourceFile:387)
at ek.m(SourceFile:220)
at ek.a(SourceFile:229)
at bkz.a(SourceFile:251)
at bgr.e(SourceFile:118)

-- Affected screen --
Details:
Screen name: bgr
Stacktrace:
at bcf.t(SourceFile:1590)
at bcf.av(SourceFile:962)
at bcf.a(SourceFile:392)
at net.minecraft.client.main.Main.main(SourceFile:124)

-- System Details --
Details:
Minecraft Version: 1.9
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 342872792 bytes (326 MB) / 489996288 bytes (467 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 1.9
LWJGL: 2.9.4
OpenGL: Intel(R) HD Graphics 5500 GL version 4.4.0 - Build 10.18.15.4279, Intel
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: No
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs:
Current Language: Français canadien (Canada)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz