I have had the same problem. Here is the information I get, If you know a fix please reply asap!
Completely ignored arguments: [--nativeLauncherVersion, 286]
[21:35:30] [Client thread/INFO]: Setting user: DivinePixel
[21:35:30] [Client thread/INFO]: (Session ID is token:9affafecb344433a974506c069071b9e:746719e7e391412f8babb811e218a1c8)
[21:35:31] [Client thread/INFO]: LWJGL Version: 2.9.4
[21:35:32] [Client thread/INFO]: Reloading ResourceManager: Default
[21:35:32] [Client thread/WARN]: Missing sound for event: minecraft:entity.snowman.ambient
[21:35:32] [Client thread/WARN]: Missing sound for event: minecraft:item.bottle.fill_dragonbreath
[21:35:32] [Sound Library Loader/INFO]: Starting up SoundSystem...
[21:35:33] [Thread-5/INFO]: Initializing LWJGL OpenAL
[21:35:33] [Thread-5/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[21:35:33] [Thread-5/INFO]: OpenAL initialized.
[21:35:33] [Sound Library Loader/INFO]: Sound engine started
[21:35:34] [Client thread/INFO]: Created: 1024x512 textures-atlas
[21:35:35] [Client thread/ERROR]: Realms module missing
[21:35:50] [Client thread/ERROR]: Exception reading C:\Users\lukes\AppData\Roaming\.minecraft\saves\Creaters World\level.dat
e: Loading NBT data
at dx.a(SourceFile:123) ~[16w03a.jar:?]
at dx.a(SourceFile:82) ~[16w03a.jar:?]
at dx.a(SourceFile:26) ~[16w03a.jar:?]
at azd.a(SourceFile:82) [16w03a.jar:?]
at azd.c(SourceFile:66) [16w03a.jar:?]
at aza.b(SourceFile:57) [16w03a.jar:?]
at bhl.e(SourceFile:35) [16w03a.jar:?]
at bhl.<init>(SourceFile:28) [16w03a.jar:?]
at bhj.b(SourceFile:43) [16w03a.jar:?]
at bey.a(SourceFile:367) [16w03a.jar:?]
at bcc.a(SourceFile:881) [16w03a.jar:?]
at bff.a(SourceFile:237) [16w03a.jar:?]
at bey.a(SourceFile:341) [16w03a.jar:?]
at bff.a(SourceFile:498) [16w03a.jar:?]
at bey.k(SourceFile:404) [16w03a.jar:?]
at bey.p(SourceFile:381) [16w03a.jar:?]
at bcc.s(SourceFile:1563) [16w03a.jar:?]
at bcc.au(SourceFile:949) [16w03a.jar:?]
at bcc.a(SourceFile:390) [16w03a.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:122) [16w03a.jar:?]
Caused by: java.io.EOFException: Unexpected end of ZLIB input stream
at java.util.zip.InflaterInputStream.fill(InflaterInputStream.java:240) ~[?:1.8.0_25]
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.read(GZIPInputStream.java:117) ~[?:1.8.0_25]
at java.io.BufferedInputStream.read1(BufferedInputStream.java:284) ~[?:1.8.0_25]
at java.io.BufferedInputStream.read(BufferedInputStream.java:345) ~[?:1.8.0_25]
at java.io.DataInputStream.readFully(DataInputStream.java:195) ~[?:1.8.0_25]
at java.io.DataInputStream.readUTF(DataInputStream.java:609) ~[?:1.8.0_25]
at java.io.DataInputStream.readUTF(DataInputStream.java:564) ~[?:1.8.0_25]
at dn.b(SourceFile:407) ~[16w03a.jar:?]
at dn.a(SourceFile:68) ~[16w03a.jar:?]
at dx.a(SourceFile:117) ~[16w03a.jar:?]
... 19 more
[21:35:50] [Client thread/ERROR]: Exception reading C:\Users\lukes\AppData\Roaming\.minecraft\saves\Creaters World\level.dat_old
e: Loading NBT data
at dx.a(SourceFile:123) ~[16w03a.jar:?]
at dx.a(SourceFile:82) ~[16w03a.jar:?]
at dx.a(SourceFile:26) ~[16w03a.jar:?]
at azd.a(SourceFile:82) [16w03a.jar:?]
at azd.c(SourceFile:74) [16w03a.jar:?]
at aza.b(SourceFile:57) [16w03a.jar:?]
at bhl.e(SourceFile:35) [16w03a.jar:?]
at bhl.<init>(SourceFile:28) [16w03a.jar:?]
at bhj.b(SourceFile:43) [16w03a.jar:?]
at bey.a(SourceFile:367) [16w03a.jar:?]
at bcc.a(SourceFile:881) [16w03a.jar:?]
at bff.a(SourceFile:237) [16w03a.jar:?]
at bey.a(SourceFile:341) [16w03a.jar:?]
at bff.a(SourceFile:498) [16w03a.jar:?]
at bey.k(SourceFile:404) [16w03a.jar:?]
at bey.p(SourceFile:381) [16w03a.jar:?]
at bcc.s(SourceFile:1563) [16w03a.jar:?]
at bcc.au(SourceFile:949) [16w03a.jar:?]
at bcc.a(SourceFile:390) [16w03a.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:122) [16w03a.jar:?]
Caused by: java.io.EOFException: Unexpected end of ZLIB input stream
at java.util.zip.InflaterInputStream.fill(InflaterInputStream.java:240) ~[?:1.8.0_25]
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:158) ~[?:1.8.0_25]
at java.util.zip.GZIPInputStream.read(GZIPInputStream.java:117) ~[?:1.8.0_25]
at java.io.BufferedInputStream.read1(BufferedInputStream.java:284) ~[?:1.8.0_25]
at java.io.BufferedInputStream.read(BufferedInputStream.java:345) ~[?:1.8.0_25]
at java.io.DataInputStream.readFully(DataInputStream.java:195) ~[?:1.8.0_25]
at java.io.DataInputStream.readUTF(DataInputStream.java:609) ~[?:1.8.0_25]
at java.io.DataInputStream.readUTF(DataInputStream.java:564) ~[?:1.8.0_25]
at dn.b(SourceFile:407) ~[16w03a.jar:?]
at dn.a(SourceFile:68) ~[16w03a.jar:?]
at dx.a(SourceFile:117) ~[16w03a.jar:?]
... 19 more
[21:35:50] [Client thread/WARN]: Unable to resolve BlockEntity for ItemInstance: minecraft:shield
I have had the same problem.
Here is the information I get, If you know a fix please reply asap!