Basically, I went on minecraft I clicked on 'Multiplayer' and then I just crash for some reason... I keep crashing on every version I play. I mainly play on 1.10/1.10.2 the crash is called a heap dump I need help please!

So, this is basically what has happened. This is the information please help me as soon as possible!

Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 14/11/16 5:45 PM
Description: Rendering screen

java.lang.IllegalArgumentException: bad Base64 input character at 4030: 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 bgs.c(SourceFile:212)
at bgs.a(SourceFile:145)
at bdj.a(SourceFile:25)
at bdo.b(SourceFile:411)
at bdo.a(SourceFile:210)
at bgp.a(SourceFile:295)
at bnd.a(SourceFile:1056)
at bcd.av(SourceFile:992)
at bcd.a(SourceFile:399)
at net.minecraft.client.main.Main.main(SourceFile:124)

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

– Head –
Thread: Client thread
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 bgs.c(SourceFile:212)
at bgs.a(SourceFile:145)
at bdj.a(SourceFile:25)
at bdo.b(SourceFile:411)
at bdo.a(SourceFile:210)
at bgp.a(SourceFile:295)

– Screen render details –
Details:
Screen name: bgp
Mouse location: Scaled: (301, 151). Absolute: (602, 176)
Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2
Stacktrace:
at bnd.a(SourceFile:1056)
at bcd.av(SourceFile:992)
at bcd.a(SourceFile:399)
at net.minecraft.client.main.Main.main(SourceFile:124)

– System Details –
Details:
Minecraft Version: 1.9.4
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: 62302272 bytes (59 MB) / 208007168 bytes (198 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: 1.9.4
LWJGL: 2.9.4
OpenGL: AMD Radeon(TM) R2 Graphics GL version 4.5.13399 Compatibility Profile Context 15.201.1101.0, ATI Technologies Inc.
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: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (US)
Profiler Position: N/A (disabled)
CPU: bcd$7@633c0a61