Just made server, keep getting kicked out.

I have immersive portals on my Minecraft Server, and fabric API. Without the fabric API, the server wouldn't start up and kept crashing. When I joined though, I was greeted with text that said :

Internal Exception: io.netty.handler.codec.DecoderException:

java.io.IOException: Packet 0/56 (sz) was larger than I expected, found 4 bytes extra whilst reading packet 56

Please help, I really wanna play immersive portals MC. I think it may be due to the fact I have impact, meteor, and wurst somewhere in my minecraft folder. Those are hacked clients, but even after I took them out I had this exact error message. I even stopped playing on a fabric version. Please, help. Should I reinstall minecraft? This doesn't happen with other servers.

Oh yeah, sorry. Here it is!

Fabric server log [#UZcQd2h] - mclo.gs

OMG I FORGOT TO INSTALL PEHKUI IS THAT IT?

Update, I installed pehkui onto it but it still displays the same message. In the logs, it also says "Missing Gravity Changer". Is that a mod I should install, like pehkui?

Another update, I installed that but it STILL displays the same message. I'll share my new logs. https://mclo.gs/f0E4FRv

The log in my minecraft folder?

I'm on mac, so instead I did ~/Library/Application Support/minecraft, then I clicked logs, then opened it with text edit. That's unrelated though, just mentioning. Alright, heres the logs. https://mclo.gs/yCvjl9h

regular minecraft launcher???

i do have hacks tho but i was using normal minecraft atm

no, should i put them on?

when i installed the mods as if i was about to play a singeplayer immersive portals game, and joined, it displayed new text that stated

Registry remapping failed: Received ID map for minecraft:item contains IDs

unknown to the receiver!

- gravitychanger:gravity_changer_south

- gravitychanger:gravity_changer_north

- gravitychanger:gravity_changer_up

- gravitychanger:gravity_changer_east

- gravitychanger:gravity_changer_west

- gravitychanger:gravity_changer_down

I put Pehkui for +1.14.4 - 1.18.1 in my mods folder, as well as fabric API +1.18. , immersive portals 1.18.1, and I used the fabric installer to install a minecraft fabric version for the mods to be on. They even worked on a minecraft singleplayer world, but with one issue. The chat said "[Immersive Portals] You are using Intel videocard. GUI rendering may be abnormal. This issue is still under investigation.". This doesn't normally occur when I play immersive portals, but the game still functioned alright. Did I download it wrong? Last time I used this mod was 1.17 or something with 1.17 in it, like 1.17.1.

Gravity Changer? I didn't have that last time I installed 1.18.1 Immersive Portals. Let me install it. OMFG I GOT INTO THE SERVER HELL YESSSSS THANK YOU SO MUCH!