MalformedJsonException when starting 18w03b

When i try to start the newest Snapshot, i get this error:

Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: @unknown

Time: 19.01.18 19:51
Description: Initializing game

com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Unterminated string at line 7 column 1 path $.pack.description
at com.google.gson.internal.Streams.parse(Streams.java:60)
at com.google.gson.JsonParser.parse(JsonParser.java:84)
at com.google.gson.JsonParser.parse(JsonParser.java:59)
at sg.a(SourceFile:72)
at sg.a(SourceFile:65)
at sy.a(SourceFile:35)
at st.a(SourceFile:38)
at sv.a(SourceFile:33)
at boe.a(SourceFile:1170)
at bob.an(SourceFile:439)
at bob.a(SourceFile:367)
at net.minecraft.client.main.Main.main(SourceFile:140)
Caused by: com.google.gson.stream.MalformedJsonException: Unterminated string at line 7 column 1 path $.pack.description
at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:1559)
at com.google.gson.stream.JsonReader.nextQuotedValue(JsonReader.java:1017)
at com.google.gson.stream.JsonReader.nextString(JsonReader.java:815)
at com.google.gson.internal.bind.TypeAdapters$29.read(TypeAdapters.java:718)
at com.google.gson.internal.bind.TypeAdapters$29.read(TypeAdapters.java:739)
at com.google.gson.internal.bind.TypeAdapters$29.read(TypeAdapters.java:739)
at com.google.gson.internal.bind.TypeAdapters$29.read(TypeAdapters.java:714)
at com.google.gson.internal.Streams.parse(Streams.java:48)
... 11 more

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

– Head –
Thread: Client thread
Stacktrace:
at com.google.gson.internal.Streams.parse(Streams.java:60)
at com.google.gson.JsonParser.parse(JsonParser.java:84)
at com.google.gson.JsonParser.parse(JsonParser.java:59)
at sg.a(SourceFile:72)
at sg.a(SourceFile:65)
at sy.a(SourceFile:35)
at st.a(SourceFile:38)
at sv.a(SourceFile:33)
at boe.a(SourceFile:1170)
at bob.an(SourceFile:439)

– Initialization –
Details:
Stacktrace:
at bob.a(SourceFile:367)
at net.minecraft.client.main.Main.main(SourceFile:140)

– System Details –
Details:
Minecraft Version: 18w03b
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: 54179112 bytes (51 MB) / 117440512 bytes (112 MB) up to 1073741824 bytes (1024 MB)
JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 18w03b
LWJGL: 3.1.2 build 29
OpenGL: GeForce GTX 1060 3GB/PCIe/SSE2 GL version 4.6.0 NVIDIA 388.13, 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: ~_ERROR~ NullPointerException: null
Profiler Position: N/A (disabled)
CPU: 8x Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz