Ok so I try to connect to a certain Envy Block Pixelmon Server and I get this:

 

---- Minecraft Crash Report ----

// Don't be sad. I'll do better next time, I promise!

 

Time: 8/27/14 10:38 AM

Description: Ticking screen

 

java.lang.NullPointerException: Ticking screen

at com.mojang.util.UUIDTypeAdapter.fromUUID(UUIDTypeAdapter.java:22)

at com.mojang.util.UUIDTypeAdapter.write(UUIDTypeAdapter.java:13)

at com.mojang.util.UUIDTypeAdapter.write(UUIDTypeAdapter.java:10)

at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)

at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:89)

at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:195)

at com.google.gson.Gson.toJson(Gson.java:593)

at com.google.gson.Gson.toJson(Gson.java:572)

at com.google.gson.Gson.toJson(Gson.java:527)

at com.google.gson.Gson.toJson(Gson.java:507)

at com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService.makeRequest(YggdrasilAuthenticationService.java:54)

at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.joinServer(YggdrasilMinecraftSessionService.java:76)

at net.minecraft.client.network.NetHandlerLoginClient.func_147389_a(NetHandlerLoginClient.java:62)

at net.minecraft.network.login.server.S01PacketEncryptionRequest.func_148833_a(SourceFile:41)

at net.minecraft.network.login.server.S01PacketEncryptionRequest.func_148833_a(SourceFile:10)

at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)

at net.minecraft.client.multiplayer.GuiConnecting.func_73876_c(SourceFile:78)

at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1649)

at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:961)

at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:887)

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:134)

at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

 

 

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

---------------------------------------------------------------------------------------

 

-- Head --

Stacktrace:

at com.mojang.util.UUIDTypeAdapter.fromUUID(UUIDTypeAdapter.java:22)

at com.mojang.util.UUIDTypeAdapter.write(UUIDTypeAdapter.java:13)

at com.mojang.util.UUIDTypeAdapter.write(UUIDTypeAdapter.java:10)

at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:68)

at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:89)

at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:195)

at com.google.gson.Gson.toJson(Gson.java:593)

at com.google.gson.Gson.toJson(Gson.java:572)

at com.google.gson.Gson.toJson(Gson.java:527)

at com.google.gson.Gson.toJson(Gson.java:507)

at com.mojang.authlib.yggdrasil.YggdrasilAuthenticationService.makeRequest(YggdrasilAuthenticationService.java:54)

at com.mojang.authlib.yggdrasil.YggdrasilMinecraftSessionService.joinServer(YggdrasilMinecraftSessionService.java:76)

at net.minecraft.client.network.NetHandlerLoginClient.func_147389_a(NetHandlerLoginClient.java:62)

at net.minecraft.network.login.server.S01PacketEncryptionRequest.func_148833_a(SourceFile:41)

at net.minecraft.network.login.server.S01PacketEncryptionRequest.func_148833_a(SourceFile:10)

at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212)

at net.minecraft.client.multiplayer.GuiConnecting.func_73876_c(SourceFile:78)

 

-- Affected screen --

Details:

Screen name: net.minecraft.client.multiplayer.GuiConnecting

Stacktrace:

at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1649)

at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:961)

at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:887)

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:134)

at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

 

-- System Details --

Details:

Minecraft Version: 1.7.10

Operating System: Windows 7 (x86) version 6.1

Java Version: 1.7.0_67, Oracle Corporation

Java VM Version: Java HotSpot Client VM (mixed mode, sharing), Oracle Corporation

Memory: 239636456 bytes (228 MB) / 423268352 bytes (403 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

FML: MCP v9.05 FML v7.10.18.1180 Minecraft Forge 10.13.0.1180 4 mods loaded, 4 mods active

mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available

FML{7.10.18.1180} [Forge Mod Loader] (forge-1.7.10-10.13.0.1180.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available

Forge{10.13.0.1180} [Minecraft Forge] (forge-1.7.10-10.13.0.1180.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available

pixelmon{3.2.5} [Pixelmon] (Pixelmon-1.7.10-3.2.5-universal.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available

Launched Version: 1.7.10-Forge10.13.0.1180

LWJGL: 2.9.1

OpenGL: ATI Radeon HD 4300/4500 Series GL version 3.3.11672 Compatibility Profile Context, 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: Definitely; Client brand changed to 'fml,forge'

Type: Client (map_client.txt)

Resource Packs: []

Current Language: English (US)

Profiler Position: N/A (disabled)

Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used

Anisotropic Filtering: Off (1)

 

I'm not too good at reading Java code, someone please take a look at this.

Do you have an official version of the game ?