Minecraft Forums

Sorry if this isn't the right place for this but my minecraft is having a weird crash report constantly. I can get on minecraft, go into single player, realms, and options BUT NOT MULTIPLAYER! I click multiplayer and it just crashes my minecraft. Please help!

By the way I am using optifine and its 1.8.3.

Does it give you a crash log? If so, can you post it here?

Here is the crash report:

---- Minecraft Crash Report ----
// You're mean.

Time: 4/26/15 1:28 PM
Description: Rendering screen

java.lang.IllegalArgumentException: bad Base64 input character at 5126: 0 (decimal)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:247)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:197)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:188)
at azl.c(SourceFile:212)
at azl.a(SourceFile:145)
at awe.a(SourceFile:25)
at awj.b(SourceFile:412)
at awj.a(SourceFile:211)
at azi.a(SourceFile:291)
at bfl.a(EntityRenderer.java:1321)
at avf.av(SourceFile:914)
at avf.a(SourceFile:325)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
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 io.netty.handler.codec.base64.Base64.decode(Base64.java:247)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:197)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:188)
at azl.c(SourceFile:212)
at azl.a(SourceFile:145)
at awe.a(SourceFile:25)
at awj.b(SourceFile:412)
at awj.a(SourceFile:211)
at azi.a(SourceFile:291)

-- Screen render details --
Details:
Screen name: azi
Mouse location: Scaled: (273, 138). Absolute: (547, 203)
Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2
Stacktrace:
at bfl.a(EntityRenderer.java:1321)
at avf.av(SourceFile:914)
at avf.a(SourceFile:325)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

-- System Details --
Details:
Minecraft Version: 1.8.3
Operating System: Windows XP (x86) version 5.1
CPU: 2x Intel(R) Pentium(R) 4 CPU 3.00GHz
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 140000776 bytes (133 MB) / 234233856 bytes (223 MB) up to 523501568 bytes (499 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.8.3-OptiFine_HD_U_B2
LWJGL: 2.9.4
OpenGL: GeForce FX 5500/PCI/SSE2 GL version 2.0.3, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Not using framebuffer objects because OpenGL 1.4 is supported, EXT_blend_func_separate is not supported, OpenGL 3.0 is not supported, ARB_framebuffer_object is not supported, and EXT_framebuffer_object is not supported.
Shaders are not available because OpenGL 2.1 is not supported, ARB_shader_objects is not supported, ARB_vertex_shader is not supported, and ARB_fragment_shader is not 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: [faithful32pack.zip]
Current Language: English (US)
Profiler Position: N/A (disabled)

The crash is weird because my minecraft was working perfectly fine 2 hours ago!

Did you install OptiFine the manual way? Or did you click on installer and let it run?

Ok reinstalling mc didnt work and I downloaded optifine by letting it install automatically.