B3lette

I uninstalled, rebooted, reinstalled java (8u251-64bits). I made a clean new 31.1.46 server (new world, mods from 5 days ago when I know it was working). I made a new client instance, and I'm still locked out of any modded server, with the java.io.UTFDataFormatException error, with a varying malformed input index (when I connect I get 60 and then 80 for example). How is it even possible ? I'm using the same versions that when it worked 5 days ago ! I'm so lost here ... I am able to connect in vanilla though. I wonder if it is a hidden timeout error with modded connection that has to exchange infos (see above logs for FML handshake) If anyone has a clue ...

Hello, I am hosting a modded server on my computer, to play with some friends. I have a server and a client running on the same machine, and all was working fine until today. My client is joining 127.0.0.1:25565. Everyday I update my mods to the latest version. Today I did it too, but I couldn't join my server anymore. So I went back to the "yesterday" version of my mods. Sadly, I didn't do a backup of my world directory. Now I'm stuck and I'm afraid my world has been damaged by going from one version of mods to another and back ... I use Forge-1.15.2-31.1.46 and the following mods are installed : Client Mods : Server mods : All Client mods except: [✔️] rad-1.15-3.0.0 [✔️] Indicatia-1.15.2-3.0.1 And with : [✔️] dcintegration-1.1.14-1.15.jar Server/Client side mods are binary checked using WinMerge and seem OK. I'm locked out of my server : nobody can join anymore. After the "Joining world" message, I get kicked and receive the following error message : The server log prints this : [23:00:39] [User Authenticator #7/INFO] [minecraft/ServerLoginNetHandler]: UUID of player B3lette is 2d933bca-b3da-4f0b-94a4-75693849e9a1 [23:00:39] [Netty Server IO #14/INFO] [journeymap/]: Dev Mode? [23:01:05] [Server thread/INFO] [thutessentials/]: B3lette[/127.0.0.1:62283] logged in with entity id 735 at (-1.3923844753554724, 64.0, -705.7813407636404) [23:01:05] [Server thread/INFO] [minecraft/DedicatedServer]: B3lette joined the game [23:01:05] [Server thread/INFO] [se.mi.te.da.DataManager/]: Sending data to client: B3lette [23:01:05] [Server thread/INFO] [Waila/]: Syncing config to B3lette (2d933bca-b3da-4f0b-94a4-75693849e9a1) [23:01:05] [Server thread/INFO] [thutessentials/]: Login detected, adding player to logins for defuzz. [23:01:05] [Netty Server IO #14/ERROR] [minecraft/ArgumentTypes]: Could not serialize biomesoplenty.common.command.BiomeArgument@2857b861 (class biomesoplenty.common.command.BiomeArgument) - will not be sent to client! [23:01:05] [Netty Server IO #14/ERROR] [minecraft/ArgumentTypes]: Could not serialize net.minecraftforge.server.command.ModIdArgument@2cedfd6d (class net.minecraftforge.server.command.ModIdArgument) - will not be sent to client! [23:01:05] [Netty Server IO #14/ERROR] [minecraft/ArgumentTypes]: Could not serialize net.minecraftforge.server.command.EnumArgument@1f9a74db (class net.minecraftforge.server.command.EnumArgument) - will not be sent to client! [23:01:05] [Netty Server IO #14/ERROR] [minecraft/ArgumentTypes]: Could not serialize net.minecraftforge.server.command.EnumArgument@61b4e80d (class net.minecraftforge.server.command.EnumArgument) - will not be sent to client! [23:01:05] [Netty Server IO #14/ERROR] [minecraft/ArgumentTypes]: Could not serialize com.ldtteam.structurize.commands.arguments.MultipleStringArgument@db81c69 (class com.ldtteam.structurize.commands.arguments.MultipleStringArgument) - will not be sent to client! [23:01:05] [Server thread/INFO] [minecraft/ServerPlayNetHandler]: B3lette lost connection: Disconnected [23:01:05] [Server thread/INFO] [minecraft/DedicatedServer]: B3lette left the game The client log prints this : [m[32m[23:02:15] [Render thread/INFO] [minecraft/ConnectingScreen]: Connecting to 127.0.0.1, 25565 [m[1;31m[23:02:16] [Netty Client IO #7/ERROR] [ne.mi.fm.ne.FMLHandshakeHandler/FMLHANDSHAKE]: Recieved unexpected index 0 in client reply [m[32m[23:02:16] [Netty Client IO #7/INFO] [Silent's Gems/]: Received 124 soul info objects from server [m[32m[23:02:16] [Netty Client IO #7/INFO] [Silent Gear/]: Read 48 traits from server [m[32m[23:02:16] [Netty Client IO #7/INFO] [Silent Gear/]: Read 116 parts from server [m[32m[23:02:16] [Netty Client IO #7/INFO] [journeymap/]: Dev Mode? [m[32m[23:02:42] [Netty Client IO #7/INFO] [thutcore/]: Reading thutcrafts-server.toml [m[32m[23:02:43] [Netty Client IO #7/INFO] [ne.mi.fm.ne.NetworkHooks/]: Connected to a modded server. [m[33m[23:02:43] [Render thread/WARN] [minecolonies/]: World load [m[32m[23:02:43] [Render thread/INFO] [minecolonies/]: Removed all colony views Server and client Debug Logs : https://mega.nz/file/4Qk1DDpT#Uwe5TwwohXNQ8LeTKsEdPYs0TerdZ5Z2gNUNhdOS9Mo I have no idea what to do ... Any clue ? Thanks for reading