Every time I open a multiplayer server, Minecraft crashes and a crash report opens on the Minecraft launcher - this doesn't happen with singleplayer worlds though. Here is a copy of the crash report if it helps;

---- Minecraft Crash Report ----
// Quite honestly, I wouldn't worry myself about that.

Time: 22/06/16 17:56
Description: Server forgot to send required information to construct BlockEntity

java.lang.RuntimeException: Missing BlockEntity
at bqy.b(SourceFile:162)
at bqu.a(SourceFile:100)
at bqu.run(SourceFile:43)
at java.lang.Thread.run(Thread.java:745)

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

– BlockEntity missing instance data –
Details:
BlockState: minecraft:chest[facing=west]
Block coordinates: World: (2021,50,-38), Chunk: (at 5,3,10 in 126,-3; contains blocks 2016,0,-48 to 2031,255,-33), Region: (3,-1; contains chunks 96,-32 to 127,-1, blocks 1536,0,-512 to 2047,255,-1)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bnn['Madchicken2014'/12426, l='MpServer', x=2000.52, y=46.00, z=-4.51]]
Chunk stats: MultiplayerChunkCache: 441, 441
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (-999999,575,-999999), Chunk: (at 1,35,1 in -62500,-62500; contains blocks -1000000,0,-1000000 to -999985,255,-999985), Region: (-1954,-1954; contains chunks -62528,-62528 to -62497,-62497, blocks -1000448,0,-1000448 to -999937,255,-999937)
Level time: 1003449759 game time, 5186956000 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
Forced entities: 95 total; [bnn['Madchicken2014'/12426, l='MpServer', x=2000.52, y=46.00, z=-4.51], xz['entity.ItemFrame.name'/56, l='MpServer', x=1990.50, y=50.50, z=0.03], xz['entity.ItemFrame.name'/57, l='MpServer', x=1990.50, y=49.50, z=0.03], xz['entity.ItemFrame.name'/58, l='MpServer', x=1990.50, y=48.50, z=0.03], xz['entity.ItemFrame.name'/59, l='MpServer', x=1990.50, y=47.50, z=0.03], xz['entity.ItemFrame.name'/60, l='MpServer', x=1990.50, y=50.50, z=-0.97], xz['entity.ItemFrame.name'/61, l='MpServer', x=1990.50, y=49.50, z=-0.97], xz['entity.ItemFrame.name'/62, l='MpServer', x=1990.50, y=48.50, z=-0.97], xz['entity.ItemFrame.name'/63, l='MpServer', x=1990.50, y=47.50, z=-0.97], xz['entity.ItemFrame.name'/64, l='MpServer', x=1990.50, y=50.50, z=-1.97], xz['entity.ItemFrame.name'/65, l='MpServer', x=1990.50, y=49.50, z=-1.97], xz['entity.ItemFrame.name'/66, l='MpServer', x=1990.50, y=48.50, z=-1.97], xz['entity.ItemFrame.name'/67, l='MpServer', x=1990.50, y=47.50, z=-1.97], xz['entity.ItemFrame.name'/68, l='MpServer', x=1990.50, y=50.50, z=-2.97], xz['entity.ItemFrame.name'/69, l='MpServer', x=1990.50, y=49.50, z=-2.97], xz['entity.ItemFrame.name'/70, l='MpServer', x=1990.50, y=48.50, z=-2.97], xz['entity.ItemFrame.name'/71, l='MpServer', x=1990.50, y=47.50, z=-2.97], xz['entity.ItemFrame.name'/72, l='MpServer', x=1990.50, y=50.50, z=-3.97], xz['entity.ItemFrame.name'/73, l='MpServer', x=1990.50, y=49.50, z=-3.97], xz['entity.ItemFrame.name'/74, l='MpServer', x=1990.50, y=48.50, z=-3.97], xz['entity.ItemFrame.name'/75, l='MpServer', x=1990.50, y=47.50, z=-3.97], xz['entity.ItemFrame.name'/76, l='MpServer', x=1990.50, y=50.50, z=-4.97], xx['§aClick to open a Cubelet!'/721298355, l='MpServer', x=1977.50, y=51.50, z=-47.50], xz['entity.ItemFrame.name'/77, l='MpServer', x=1990.50, y=49.50, z=-4.97], xz['entity.ItemFrame.name'/78, l='MpServer', x=1990.50, y=48.50, z=-4.97], xz['entity.ItemFrame.name'/79, l='MpServer', x=1990.50, y=47.50, z=-4.97], xz['entity.ItemFrame.name'/80, l='MpServer', x=1990.50, y=50.50, z=-5.97], xz['entity.ItemFrame.name'/81, l='MpServer', x=1990.50, y=49.50, z=-5.97], xz['entity.ItemFrame.name'/82, l='MpServer', x=1990.50, y=48.50, z=-5.97], xz['entity.ItemFrame.name'/83, l='MpServer', x=1990.50, y=47.50, z=-5.97], xz['entity.ItemFrame.name'/84, l='MpServer', x=1990.50, y=50.50, z=-6.97], xz['entity.ItemFrame.name'/85, l='MpServer', x=1990.50, y=49.50, z=-6.97], xz['entity.ItemFrame.name'/86, l='MpServer', x=1990.50, y=48.50, z=-6.97], xz['entity.ItemFrame.name'/87, l='MpServer', x=1990.50, y=47.50, z=-6.97], xz['entity.ItemFrame.name'/88, l='MpServer', x=1990.50, y=50.50, z=-7.97], xz['entity.ItemFrame.name'/89, l='MpServer', x=1990.50, y=49.50, z=-7.97], xz['entity.ItemFrame.name'/90, l='MpServer', x=1990.50, y=48.50, z=-7.97], xz['entity.ItemFrame.name'/91, l='MpServer', x=1990.50, y=47.50, z=-7.97], xz['entity.ItemFrame.name'/92, l='MpServer', x=1990.50, y=50.50, z=-8.97], xz['entity.ItemFrame.name'/93, l='MpServer', x=1990.50, y=49.50, z=-8.97], xz['entity.ItemFrame.name'/94, l='MpServer', x=1990.50, y=48.50, z=-8.97], xz['entity.ItemFrame.name'/95, l='MpServer', x=1990.50, y=47.50, z=-8.97], xz['entity.ItemFrame.name'/96, l='MpServer', x=1990.50, y=50.50, z=-9.97], xz['entity.ItemFrame.name'/97, l='MpServer', x=1990.50, y=49.50, z=-9.97], xz['entity.ItemFrame.name'/98, l='MpServer', x=1990.50, y=48.50, z=-9.97], xz['entity.ItemFrame.name'/99, l='MpServer', x=1990.50, y=47.50, z=-9.97], xz['entity.ItemFrame.name'/100, l='MpServer', x=2010.50, y=50.50, z=-9.97], xz['entity.ItemFrame.name'/101, l='MpServer', x=2010.50, y=49.50, z=-9.97], xz['entity.ItemFrame.name'/102, l='MpServer', x=2010.50, y=48.50, z=-9.97], xz['entity.ItemFrame.name'/103, l='MpServer', x=2010.50, y=47.50, z=-9.97], xz['entity.ItemFrame.name'/104, l='MpServer', x=2010.50, y=50.50, z=-8.97], xz['entity.ItemFrame.name'/105, l='MpServer', x=2010.50, y=49.50, z=-8.97], xx['§aClick to open reward menu!'/234523536, l='MpServer', x=2021.50, y=51.50, z=-37.50], xz['entity.ItemFrame.name'/106, l='MpServer', x=2010.50, y=48.50, z=-8.97], xx['§cYou have 2 rewards!'/234523537, l='MpServer', x=2021.50, y=51.20, z=-37.50], xz['entity.ItemFrame.name'/107, l='MpServer', x=2010.50, y=47.50, z=-8.97], xz['entity.ItemFrame.name'/108, l='MpServer', x=2010.50, y=50.50, z=-7.97], xz['entity.ItemFrame.name'/109, l='MpServer', x=2010.50, y=49.50, z=-7.97], xz['entity.ItemFrame.name'/110, l='MpServer', x=2010.50, y=48.50, z=-7.97], xz['entity.ItemFrame.name'/111, l='MpServer', x=2010.50, y=47.50, z=-7.97], xz['entity.ItemFrame.name'/112, l='MpServer', x=2010.50, y=50.50, z=-6.97], xx['§aClick to open a Cubelet!'/836317608, l='MpServer', x=2023.50, y=51.50, z=-47.50], xz['entity.ItemFrame.name'/113, l='MpServer', x=2010.50, y=49.50, z=-6.97], xz['entity.ItemFrame.name'/114, l='MpServer', x=2010.50, y=48.50, z=-6.97], xz['entity.ItemFrame.name'/115, l='MpServer', x=2010.50, y=47.50, z=-6.97], xx['§aClick to open reward menu!'/234523534, l='MpServer', x=1979.50, y=51.50, z=-37.50], xz['entity.ItemFrame.name'/116, l='MpServer', x=2010.50, y=50.50, z=-5.97], xx['§cYou have 2 rewards!'/234523535, l='MpServer', x=1979.50, y=51.20, z=-37.50], xz['entity.ItemFrame.name'/117, l='MpServer', x=2010.50, y=49.50, z=-5.97], xz['entity.ItemFrame.name'/118, l='MpServer', x=2010.50, y=48.50, z=-5.97], xz['entity.ItemFrame.name'/119, l='MpServer', x=2010.50, y=47.50, z=-5.97], xz['entity.ItemFrame.name'/120, l='MpServer', x=2010.50, y=50.50, z=-4.97], xz['entity.ItemFrame.name'/121, l='MpServer', x=2010.50, y=49.50, z=-4.97], xz['entity.ItemFrame.name'/122, l='MpServer', x=2010.50, y=48.50, z=-4.97], xz['entity.ItemFrame.name'/123, l='MpServer', x=2010.50, y=47.50, z=-4.97], xz['entity.ItemFrame.name'/124, l='MpServer', x=2010.50, y=50.50, z=-3.97], xz['entity.ItemFrame.name'/125, l='MpServer', x=2010.50, y=49.50, z=-3.97], xz['entity.ItemFrame.name'/126, l='MpServer', x=2010.50, y=48.50, z=-3.97], xz['entity.ItemFrame.name'/127, l='MpServer', x=2010.50, y=47.50, z=-3.97], xz['entity.ItemFrame.name'/128, l='MpServer', x=2010.50, y=50.50, z=-2.97], xz['entity.ItemFrame.name'/129, l='MpServer', x=2010.50, y=49.50, z=-2.97], xz['entity.ItemFrame.name'/130, l='MpServer', x=2010.50, y=48.50, z=-2.97], xz['entity.ItemFrame.name'/131, l='MpServer', x=2010.50, y=47.50, z=-2.97], xz['entity.ItemFrame.name'/132, l='MpServer', x=2010.50, y=50.50, z=-1.97], xz['entity.ItemFrame.name'/133, l='MpServer', x=2010.50, y=49.50, z=-1.97], xz['entity.ItemFrame.name'/134, l='MpServer', x=2010.50, y=48.50, z=-1.97], xz['entity.ItemFrame.name'/135, l='MpServer', x=2010.50, y=47.50, z=-1.97], xz['entity.ItemFrame.name'/136, l='MpServer', x=2010.50, y=50.50, z=-0.97], xz['entity.ItemFrame.name'/137, l='MpServer', x=2010.50, y=49.50, z=-0.97], xz['entity.ItemFrame.name'/138, l='MpServer', x=2010.50, y=48.50, z=-0.97], xz['entity.ItemFrame.name'/139, l='MpServer', x=2010.50, y=47.50, z=-0.97], xz['entity.ItemFrame.name'/140, l='MpServer', x=2010.50, y=50.50, z=0.03], xz['entity.ItemFrame.name'/141, l='MpServer', x=2010.50, y=49.50, z=0.03], xz['entity.ItemFrame.name'/142, l='MpServer', x=2010.50, y=48.50, z=0.03], xz['entity.ItemFrame.name'/143, l='MpServer', x=2010.50, y=47.50, z=0.03]]
Retry entities: 0 total; []
Server brand: BungeeCord (git:BungeeCraft-Bootstrap:1.9.0-SNAPSHOT:9102f32:unknown) <- Spigot
Server type: Non-integrated multiplayer server
Stacktrace:
at bln.a(SourceFile:364)
at bcx.b(SourceFile:2535)
at bqu.run(SourceFile:49)
at java.lang.Thread.run(Thread.java:745)

– System Details –
Details:
Minecraft Version: 1.10.1
Operating System: Mac OS X (x86_64) version 10.10.5
Java Version: 1.8.0_74, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 107207512 bytes (102 MB) / 247877632 bytes (236 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 5 total; -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.10.1
LWJGL: 2.9.2
OpenGL: ~_ERROR~ RuntimeException: No OpenGL context found in the current thread.
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because ARB_framebuffer_object 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 (UK)
Profiler Position: N/A (disabled)
CPU: 4x Intel(R) Core(TM) i5-4260U CPU @ 1.40GHz