Minecraft optifine non va

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Salve ragazzi, vi scrivo perché sto riscontrando un fastidioso problema:

in pratica appena avvio minecraft tutto fila liscio, ma, appena cerco di caricare un mondo il gioco crasha.

questo è l'errore che mi da, qualora potesse interessare: 

---- Minecraft Crash Report ----
// Sorry :(

Time: 03/03/17 10.28
Description: Unexpected error

java.lang.NoSuchMethodError: com.mojang.authlib.minecraft.MinecraftProfileTexture.<init>(Ljava/lang/String;)V
    at blg.<init>(AbstractClientPlayer.java:46)
    at blk.<init>(SourceFile:43)
    at bjk.<init>(SourceFile:36)
    at bje.a(SourceFile:290)
    at bao.a(SourceFile:1698)
    at bao.a(SourceFile:1652)
    at bjb.a(SourceFile:125)
    at hd.a(SourceFile:70)
    at hd.a(SourceFile:13)
    at ej.a(SourceFile:174)
    at bao.p(SourceFile:1585)
    at bao.ak(SourceFile:774)
    at bao.f(SourceFile:728)
    at net.minecraft.client.main.Main.main(SourceFile:148)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

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

-- Head --
Stacktrace:
    at blg.<init>(AbstractClientPlayer.java:46)
    at blk.<init>(SourceFile:43)
    at bjk.<init>(SourceFile:36)
    at bje.a(SourceFile:290)
    at bao.a(SourceFile:1698)
    at bao.a(SourceFile:1652)
    at bjb.a(SourceFile:125)
    at hd.a(SourceFile:70)
    at hd.a(SourceFile:13)
    at ej.a(SourceFile:174)

-- Affected level --
Details:
    Level name: MpServer
    All players: 0 total; []
    Chunk stats: MultiplayerChunkCache: 0, 0
    Level seed: 0
    Level generator: ID 01 - flat, ver 0. Features enabled: false
    Level generator options: 
    Level spawn location: World: (8,64,8), Chunk: (at 8,4,8 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
    Level time: 0 game time, 0 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: creative (ID 1). Hardcore: false. Cheats: false
    Forced entities: 0 total; []
    Retry entities: 0 total; []
    Server brand: ~~ERROR~~ NullPointerException: null
    Server type: Integrated singleplayer server
Stacktrace:
    at bjf.a(SourceFile:289)
    at bao.b(SourceFile:1972)
    at bao.f(SourceFile:742)
    at net.minecraft.client.main.Main.main(SourceFile:148)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

-- System Details --
Details:
    Minecraft Version: 1.7.10
    Operating System: Windows 7 (x86) version 6.1
    Java Version: 1.8.0_45, Oracle Corporation
    Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
    Memory: 11109600 bytes (10 MB) / 68907008 bytes (65 MB) up to 518979584 bytes (494 MB)
    JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
    AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    Launched Version: 1.7.10-OptiFine_HD_U_A4
    LWJGL: 2.9.1
    OpenGL: AMD Radeon HD 5450 GL version 4.5.13399 Compatibility Profile Context 15.201.1151.1005, ATI Technologies Inc.
    GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

    Is Modded: Very likely; Jar signature invalidated
    Type: Client (map_client.txt)
    Resource Packs: []
    Current Language: Italiano (Italia)
    Profiler Position: N/A (disabled)
    Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    Anisotropic Filtering: Off (1)