When trying to enter the server it has a packet error, which it was previously working.
Not sure what caused it, might not be the mod at all but idk where else to ask.
I'm using 1.21.5 "Fabulously Optimized" pack as base and have Skyblocker + Firmament.
Here the error:
[Render thread/ERROR] Failed to handle packet class_2678[playerId=19521543, hardcore=false, levels=[ResourceKey[minecraft:dimension / minecraft:the_nether], ResourceKey[minecraft:dimension / minecraft:the_end], ResourceKey[minecraft:dimension / minecraft:overworld]], maxPlayers=60, chunkRadius=32, simulationDistance=4, reducedDebugInfo=false, showDeathScreen=true, doLimitedCrafting=false, commonPlayerSpawnInfo=class_8589[dimensionType=Reference{ResourceKey[minecraft:dimension_type / minecraft:overworld]=class_2874[fixedTime=OptionalLong.empty, hasSkyLight=true, hasCeiling=false, ultraWarm=false, natural=true, coordinateScale=1.0, bedWorks=true, respawnAnchorWorks=false, minY=0, height=256, logicalHeight=256, infiniburn=TagKey[minecraft:block / minecraft:infiniburn_overworld], effectsLocation=minecraft:overworld, ambientLight=0.0, monsterSettings=class_7512[piglinSafe=false, hasRaids=true, monsterSpawnLightTest=[0-7], monsterSpawnBlockLightLimit=0]]}, dimension=ResourceKey[minecraft:dimension / minecraft:overworld], seed=0, gameType=SURVIVAL, previousGameType=SURVIVAL, isDebug=false, isFlat=false, lastDeathLocation=Optional.empty, portalCooldown=300, seaLevel=4], enforcesSecureChat=true], disconnecting
[27/05/2025 10:17:37 a. m.] [Render thread/WARN] Failed to send a packet as the client is not connected to a server 'ServerboundRegisterPacket{wantedPackets={hyevent:location=1}} VersionedPacket{version=1}'