Minecraft crashes if i click on resourcepacks

---- Minecraft Crash Report ----
// Why is it breaking

Time: 17.12.15 21:37
Description: Unexpected error

java.lang.NullPointerException: Unexpected error
at o.eâ€.ï(Unknown Source)
at o.â€.ï(Unknown Source)
at o.â€.ï(Unknown Source)
at Qâ€.az.Câ€(Unknown Source)
at Qâ€.az.e(Unknown Source)
at Qâ€.az.ï(Unknown Source)
at net.minecraft.client.main.Main.main(Unknown Source)

A detailed walkthrough of the error, its code path and all known details is as follows:
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– System Details –
Details:
Minecraft Version: 1.8
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 134649392 bytes (128 MB) / 225710080 bytes (215 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: 0, tallocated: 0
Launched Version: GarPloit
LWJGL: 2.9.1
OpenGL: Intel(R) HD Graphics 4000 GL version 4.0.0 - Build 9.17.10.3062, 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: Very likely; Jar signature invalidated
Type: Client (map_client.txt)
Resource Packs: [Official Pack]
Current Language: English (US)
Profiler Position: N/A (disabled)