So I have access to the backend of the server that im trying to join. Tried to join it in version 1.7.10 but I keep crashing the client each time I join?

Here is the client side crash log:

---- Minecraft Crash Report ----
// Don't do that.

Time: 22/09/19 15:32
Description: Ticking screen

java.lang.IndexOutOfBoundsException
at java.nio.Buffer.checkIndex(Buffer.java:540)
at java.nio.DirectIntBufferU.get(DirectIntBufferU.java:253)
at bma.a(SourceFile:271)
at bma.a(SourceFile:220)
at bao.a(SourceFile:1694)
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 bcx.e(SourceFile:78)
at bao.p(SourceFile:1343)
at bao.ak(SourceFile:774)
at bao.f(SourceFile:728)
at net.minecraft.client.main.Main.main(SourceFile:148)


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

-- Head --
Stacktrace:
at java.nio.Buffer.checkIndex(Buffer.java:540)
at java.nio.DirectIntBufferU.get(DirectIntBufferU.java:253)
at bma.a(SourceFile:271)
at bma.a(SourceFile:220)
at bao.a(SourceFile:1694)
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 bcx.e(SourceFile:78)

-- Affected screen --
Details:
Screen name: bcx

-- Affected level --
Details:
Level name: MpServer
All players: 0 total; []
Chunk stats: MultiplayerChunkCache: 0, 0
Level seed: 0
Level generator: ID 00 - default, ver 1. 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: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 0 total; []
Retry entities: 0 total; []
Server brand: ~~ERROR~~ NullPointerException: null
Server type: Non-integrated multiplayer server
Stacktrace:
at bjf.a(SourceFile:289)
at bao.b(SourceFile:1972)
at bao.f(SourceFile:737)
at net.minecraft.client.main.Main.main(SourceFile:148)

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 90300488 bytes (86 MB) / 167772160 bytes (160 MB) up to 2147483648 bytes (2048 MB)
JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
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
LWJGL: 2.9.1
OpenGL: GeForce GTX 1080/PCIe/SSE2 GL version 4.6.0 NVIDIA 398.36, NVIDIA Corporation
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: 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)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Anisotropic Filtering: Off (1)
___________________________________________________________________

Here is what the server console is spitting out aswell

[14:31:43] [Server thread/INFO]: Starting minecraft server version 1.7.10
[14:31:43] [Server thread/INFO]: Loading properties
[14:31:43] [Server thread/INFO]: Default game type: SURVIVAL
[14:31:43] [Server thread/INFO]: Generating keypair
[14:31:43] [Server thread/INFO]: Starting Minecraft server on 192.168.1.137:25588
[14:31:43] [Server thread/INFO]: Preparing level "world"
[14:31:43] [Server thread/WARN]: Unable to find spawn biome
[14:31:44] [Server thread/INFO]: Preparing start region for level 0
[14:31:45] [Server thread/INFO]: Preparing spawn area: 21%
[14:31:46] [Server thread/INFO]: Preparing spawn area: 45%
[14:31:47] [Server thread/INFO]: Preparing spawn area: 75%
[14:31:48] [Server thread/INFO]: Done (4.737s)! For help, type "help" or "?"
[14:32:21] [User Authenticator #1/INFO]: UUID of player _Xylem_ is 2813c1b6-7b27-45d7-98e4-26bb00da1440
[14:32:21] [Server thread/INFO]: _Xylem_[/90.198.203.222:51380] logged in with entity id 2255 at (48.5, 88.0, 482.5)
[14:32:21] [Server thread/INFO]: _Xylem_ joined the game
[14:32:22] [Server thread/INFO]: _Xylem_ lost connection: TranslatableComponent{key='disconnect.genericReason', args=[Internal Exception: java.io.IOException: An existing connection was forcibly closed by the remote host], siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null}}
[14:32:22] [Server thread/INFO]: _Xylem_ left the game

I am lost on what could be causing the error