Compatible mods:
"No don't eat the spiders!"
Apex Up Your Spawns
Arena Slugcats Configurator
BeastMaster
BeastMasterPupExtras
Better Pup IA
Blood
Bouncing Ball (Uncontrollable)
Catnap
CatSupplement
Centipede Shields
Collection Labels
Custom Regions Support
Dark World
Deadlands
Deathcount
Dev Tools
Directionality Fix
Diverse Shelters
Drainage System +
Drop Button
Emerald's Tweaks & Features
Enemy Randomizer
EmgTx (Still too early to know for sure, but as of right now, no problems so far)
Expanded Leg
Expanded Outskirts
Expedition
Expedition Enhanced
Expedition Extra Config
Expedition for Mod Cat
Faster Gates
Fat Firefly
Firmly Grasp It
Fisobs
Five Pebbles Expansion (Beta)
Five Pebbles Pong
Forest Lizard
Friends of Friends
God Lizard (Uncontrollable)
Guardian
Health Bars
Howling Rift
Howling Rift code stuff
Hungry Lizards (Thanks Andrew)
Improved Input Config
Input display
Jolly Co-op
Karma reinforcement reinforcement
Kill Feed
Kills Add Time
Less Deadly Rain
LillyPuck Damage Bonus
Lizard Customizer
Lizard Variants (You can control them, won't be able to use their abilities)
Long Jump
Lunacy
MapOptions
Manual Dialogue Progression
Marshland Wastes
Merge Fix
More Slugcats Expansion
No Friend Fire
No Hunter! Don't throw that neuron!
No More Tinnitus
No Pounce Tutorial
Nutils
Once Chieftain, Always Chieftain
Open Exclusive Regions
Passage Tracker
Pebbles Reads Pearls
Pilgrims' Ascent
Pilgrims' Ascent code stuff
Pokéballs
Pullup Fix
Pupify (You might argue, this is actually a buff)
Quiet Gardens
Random Tittle Screen
Red Horror Centipede
Remix Auto Restarter
Restart Button
Revivify
Rideable Lizards
Rotund World (But I really don't recommend it with this mod) (WillowWispy my beloved)
Reaper Lizard (Uncontrollable)
Room Randomizer
Room Rando Community Logic
Running Acceleration
RwEXP
Scorched District
Scorched District code stuff
Score Galore
Scutigera
Shiny Shield Mask
Simple Spawn Swapper
SimplifiedMoveset
Sludge Lizard
Smarter Critters
SpiritSpearMod
Spit Anything
Sporantula
Sticky HUD
Strong Scavs
Struggle Mod
Surface Swimmer
TameableDDL
Triple Jump
Uncreative Lizards (Janky af, not even the earliest versions of P.S. were THIS janky)
Undersea Code Stuff
Unshackled Co-op
Vestiges
Warp World (Only fails when you teleport inside a host, cancelling your teleport)
Water Blobs
Water Spitter
Wawa Scream
What's in My Pocket?

Incompatible mods:
No Damage RNG (Freezes the game upon biting as a controlled creature)

Other Modded Slugcats:
Cloudburst: Compatible
CowBoySLugCat: Compatible
Chinacat: Compatible
MirosSlug: Compatible
NoirCatto: Compatible
Solace: Compatible, highly recommended with Apex Up Your Spawns.
Soporific: Compatible
Snailcat: Compatible
The Goph: Compatible (Keep in mind is a early version)
The Gravel-Eater: Compatible
The Guide: Incompatible, for whatever reason loading in any campaign freezes the game on the loading screen and turns white (Reported by @dollar.bug.7).
The Keeper: Compatible
The Messiah: Compatible
The Moonlight: Compatible
The Sightseer: Compatible
The Sporecat: Compatible
The Similar: Compatible
The Warrior: Compatible
The Witness: Compatible
The Vinki: Compatible
The Vocal: Compatible

Unsure:
Individual Food Bars (Works by itself, but I have a grand total of 0 friends to test if it works on multiplayer)

Not even gonna bother:
Dress My Slugcat: Not a single mod that requires DMS has ever given me an error
Any Music Related Mod: Between Aquaphibia or Extra Threat Themes it seems that no music related mod causes any errors
Community Made Challenges: No comment

rotund world should work now, atleast with the latest update

mind trying jolly coop again? made a possible fix for it

Sure.
The black screen is still there

anything in the exception log?

Yes, It's massive

mind if you sent it over in bugs (if possible)?

My memory went to 94% after I tried to paste it, I don't think it's possible

oof
would it be possible to just send the first few lines of it?

damn bruh
in any case have you tested jolly coop when it updated by any chance?

You mean the update for Jolly Coop or the new one for Score Galore?

eh both

This log is from the Jolly Coop update, I can try again if you want, might as well also test Score Galore

might be best to re-test both yeah, both seem to work fine as of now on my end

This is the log I got with Score Galore (I can still get infinite food)
NullReferenceException: Object reference not set to an instance of an object
ScoreGalore.Plugin.CountGourd (On.PlayerSessionRecord+orig_AddEat orig, PlayerSessionRecord self, PhysicalObject eatenObject) (at <c97ba79ed4b34c9a92ba2aaa3af8ba00>:0)
DMD<>?-423315328.Hook<PlayerSessionRecord::AddEat>?607214080 (PlayerSessionRecord , PhysicalObject ) (at <3ba3ddc783c243a7916c3c162022966e>:0)
SprobParasiticScug.CreatureStuff.IsEnteringDen (On.AbstractCreature+orig_IsEnteringDen orig, AbstractCreature self, WorldCoordinate den) (at <51ace6f27e444566ad3b63706650ec06>:0)
DMD<>?-423315328.Hook<AbstractCreature::IsEnteringDen>?2071088640 (AbstractCreature , WorldCoordinate ) (at <506290b2c20b4860a98770f0f99de97a>:0)
AbstractRoom.MoveEntityToDen (AbstractWorldEntity ent) (at <1014ff9a5d9941ab9e645d4f5c9384a5>:0)
AbstractCreature.OpportunityToEnterDen (WorldCoordinate den) (at <1014ff9a5d9941ab9e645d4f5c9384a5>:0)
ShortcutHandler.Update () (at <1014ff9a5d9941ab9e645d4f5c9384a5>:0)
RainWorldGame.Update () (at <1014ff9a5d9941ab9e645d4f5c9384a5>:0)
MainLoopProcess.RawUpdate (System.Single dt) (at <1014ff9a5d9941ab9e645d4f5c9384a5>:0)
RainWorldGame.RawUpdate (System.Single dt) (at <1014ff9a5d9941ab9e645d4f5c9384a5>:0)
ProcessManager.Update (System.Single deltaTime) (at <1014ff9a5d9941ab9e645d4f5c9384a5>:0)
DMD<Update>?-423315328._RainWorld::Update (RainWorld this) (at <836d5e5fbc8341adb53497c6321d7cdc>:0)
DMD<>?-423315328.Trampoline<RainWorld::Update>?283665920 (RainWorld ) (at <73b1c233302042f2984b4853578e0fb6>:0)
ImprovedInput.Plugin.RainWorld_Update (On.RainWorld+orig_Update orig, RainWorld self) (at <9e273aaf42d7451fa98e614b2b7f44a3>:0)
DMD<>?-423315328.Hook<RainWorld::Update>?-570078720 (RainWorld ) (at <1daf83daf8c149bc90d4db940276d2b6>:0)
DMD<>?-423315328.Trampoline<RainWorld::Update>?-603471360 (RainWorld ) (at <2f1d29d3b88d44159268ba87fe6fd302>:0)
Guardian.LogHooks.RainWorld_Update (On.RainWorld+orig_Update orig, RainWorld self) (at E:/RainWorldModding/Guardian/src/plugin/Hooks/LogHooks.cs:23)
UnityEngine.Debug:LogException(Exception)
Guardian.CloudLogger:LogAndUploadException(Exception) (at E:/RainWorldModding/Guardian/src/plugin/CloudLogger.cs:31)
Guardian.LogHooks:RainWorld_Update(orig_Update, RainWorld) (at E:/RainWorldModding/Guardian/src/plugin/Hooks/LogHooks.cs:27)
DMD<>?-423315328:Hook<RainWorld::Update>?423083520(RainWorld)
DMD<>?-423315328:Trampoline<RainWorld::Update>?917221376(RainWorld)
HealthBars.HealthBars:UpdatePatch(orig_Update, RainWorld)
DMD<>?-423315328:Hook<RainWorld::Update>?-1997947392(RainWorld)