1.20 server can't connect on 1.20.6 about viaversion

[Barvalg]

Please update all Via* plugins from https://ci.viaversion.com/. In case the issue still persists send the new dump and the issue will be reopened

[Kichura]

Also update paper to 1.20.1 as that minecraft version has critical bug fixes.

[Liso7150]

updated paper and viaversion, problem still occures

[Liso7150]

We've made a dump with useful information, report your issue and provide this url: https://dump.viaversion.com/6b5a55dbb1e0e920ddd1d6b3453cb043b6a7872469e17134c844fc62217833fc

[Barvalg]

[FlorianMichael]

Please post an crash log

[Liso7150]

[00:49:14 INFO]: Server Ping Player Sample Count: 12
[00:49:14 WARN]: [!] The timings profiler has been enabled but has been scheduled for removal from Paper in the future.
We recommend installing the spark profiler as a replacement: https://spark.lucko.me/
For more information please visit: PaperMC/Paper#8948
[00:49:14 INFO]: [ChunkTaskScheduler] Chunk system is using 1 I/O threads, 5 worker threads, and gen parallelism of 5 threads
[00:49:14 INFO]: Default game type: SURVIVAL
[00:49:14 INFO]: Generating keypair
[00:49:14 INFO]: Starting Minecraft server on *:25565
[00:49:14 INFO]: Using default channel type
[00:49:15 INFO]: Paper: Using Java compression from Velocity.
[00:49:15 INFO]: Paper: Using Java cipher from Velocity.
[00:49:15 INFO]: [ViaVersion] Loading server plugin ViaVersion v4.10.1-SNAPSHOT
[00:49:15 INFO]: [ViaVersion] ViaVersion 4.10.1-SNAPSHOT is now loaded. Registering protocol transformers and injecting...
[00:49:15 INFO]: [ViaVersion] Loading block connection mappings ...
[00:49:15 INFO]: [ViaVersion] Using FastUtil Long2ObjectOpenHashMap for block connections
[00:49:16 INFO]: Server permissions file permissions.yml is empty, ignoring it
[00:49:16 INFO]: Preparing level "world"
[00:49:16 INFO]: Preparing start region for dimension minecraft:overworld
[00:49:16 INFO]: Time elapsed: 223 ms
[00:49:16 INFO]: Preparing start region for dimension minecraft:the_nether
[00:49:16 INFO]: Time elapsed: 17 ms
[00:49:16 INFO]: Preparing start region for dimension minecraft:the_end
[00:49:17 INFO]: Time elapsed: 13 ms
[00:49:17 INFO]: [ViaVersion] Enabling ViaVersion v4.10.1-SNAPSHOT
[00:49:17 INFO]: [ViaVersion] ViaVersion detected server version: 1.20-1.20.1 (763)
[00:49:17 INFO]: Running delayed init tasks
[00:49:17 INFO]: Done (3.602s)! For help, type "help"
[00:49:17 INFO]: Timings Reset
[00:49:17 INFO]: [ViaVersion] Finished mapping loading, shutting down loader executor!
[00:49:17 INFO]: [ViaVersion] You are running a development version of the plugin, please report any bugs to GitHub.
[00:49:30 INFO]: UUID of player Liso1_ is afdeb766-fdd0-48d0-a9d7-46aa9c71e794
[00:49:30 INFO]: Liso1_ joined the game
[00:49:30 INFO]: Liso1_[/[0:0:0:0:0:0:0:1]:50960] logged in with entity id 174 at ([world]0.5, 102.0, 7.5)
[00:49:30 INFO]: Liso1_ lost connection: Disconnected
[00:49:30 INFO]: Liso1_ left the game

viaversion dump
[00:49:40 INFO]: We've made a dump with useful information, report your issue and provide this url: https://dump.viaversion.com/6b5a55dbb1e0e920ddd1d6b3453cb043b6a7872469e17134c844fc62217833fc

[Barvalg]

[FlorianMichael]

Also the latest.log file of the client

[Liso7150]

new server log:
Starting org.bukkit.craftbukkit.Main
*** Warning, you've not updated in a while! ***
*** Please download a new build as per instructions from https://papermc.io/downloads/paper ***
System Info: Java 21 (Java HotSpot(TM) 64-Bit Server VM 21.0.3+7-LTS-152) Host: Windows 11 10.0 (amd64)
Loading libraries, please wait...
[01:08:30 INFO]: Environment: authHost='https://authserver.mojang.com', accountsHost='https://api.mojang.com', sessionHost='https://sessionserver.mojang.com', servicesHost='https://api.minecraftservices.com', name='PROD'
[01:08:33 INFO]: Loaded 7 recipes
[01:08:33 INFO]: Starting minecraft server version 1.20.1
[01:08:33 INFO]: Loading properties
[01:08:33 INFO]: This server is running Paper version git-Paper-196 (MC: 1.20.1) (Implementing API version 1.20.1-R0.1-SNAPSHOT) (Git: 773dd72)
[01:08:35 INFO]: Server Ping Player Sample Count: 12
[01:08:35 INFO]: Using 4 threads for Netty based IO
[01:08:35 WARN]: [!] The timings profiler has been enabled but has been scheduled for removal from Paper in the future.
We recommend installing the spark profiler as a replacement: https://spark.lucko.me/
For more information please visit: PaperMC/Paper#8948
[01:08:35 INFO]: [ChunkTaskScheduler] Chunk system is using 1 I/O threads, 5 worker threads, and gen parallelism of 5 threads
[01:08:35 INFO]: Default game type: SURVIVAL
[01:08:35 INFO]: Generating keypair
[01:08:35 INFO]: Starting Minecraft server on *:25565
[01:08:35 INFO]: Using default channel type
[01:08:35 INFO]: Paper: Using Java compression from Velocity.
[01:08:35 INFO]: Paper: Using Java cipher from Velocity.
[01:08:35 INFO]: [ViaVersion] Loading server plugin ViaVersion v4.10.1-SNAPSHOT
[01:08:35 INFO]: [ViaVersion] ViaVersion 4.10.1-SNAPSHOT is now loaded. Registering protocol transformers and injecting...
[01:08:36 INFO]: [ViaVersion] Loading block connection mappings ...
[01:08:36 INFO]: [ViaVersion] Using FastUtil Long2ObjectOpenHashMap for block connections
[01:08:36 INFO]: Server permissions file permissions.yml is empty, ignoring it
[01:08:36 INFO]: Preparing level "world"
[01:08:37 INFO]: Preparing start region for dimension minecraft:overworld
[01:08:37 INFO]: Time elapsed: 289 ms
[01:08:37 INFO]: Preparing start region for dimension minecraft:the_nether
[01:08:37 INFO]: Time elapsed: 22 ms
[01:08:37 INFO]: Preparing start region for dimension minecraft:the_end
[01:08:37 INFO]: Time elapsed: 58 ms
[01:08:37 INFO]: [ViaVersion] Enabling ViaVersion v4.10.1-SNAPSHOT
[01:08:38 INFO]: [ViaVersion] ViaVersion detected server version: 1.20-1.20.1 (763)
[01:08:40 INFO]: Running delayed init tasks
[01:08:40 INFO]: Done (6.850s)! For help, type "help"
[01:08:40 INFO]: [ViaVersion] Finished mapping loading, shutting down loader executor!
[01:08:40 INFO]: Timings Reset
[01:08:50 INFO]: [ViaVersion] You are running a development version of the plugin, please report any bugs to GitHub.
[01:08:53 INFO]: UUID of player Liso1_ is afdeb766-fdd0-48d0-a9d7-46aa9c71e794
[01:08:53 INFO]: Liso1_ joined the game
[01:08:53 INFO]: Liso1_[/[0:0:0:0:0:0:0:1]:52470] logged in with entity id 167 at ([world]203.94441144124934, 118.2240940938676, -331.15594872395013)
[01:08:53 WARN]: [ViaVersion] ERROR IN Protocol1_20_3To1_20_2 IN REMAP OF TAB_LIST (0x68)
[01:08:53 INFO]: Liso1_ lost connection: Disconnected
[01:08:53 INFO]: Liso1_ left the game

[Liso7150]

latest.log

[Liso7150]

server works on 1.20.1, but not on 1.20.6

[Liso7150]

[01:12:55 INFO]: We've made a dump with useful information, report your issue and provide this url: https://dump.viaversion.com/6b5a55dbb1e0e920ddd1d6b3453cb043b6a7872469e17134c844fc62217833fc

[Barvalg]

[Liso7150]

i noticed that line is new [01:08:53 WARN]: [ViaVersion] ERROR IN Protocol1_20_3To1_20_2 IN REMAP OF TAB_LIST (0x68)

[kennytv]

Network protocol error means you have a plugin sending bad data, usually scoreboard/tablist related. TAB for example has already fixed this some time ago in their latest version.

This was already broken before, but "only" printed an error in the client's console. Now they will forcefully disconnect themselves. You can temporarily (!) toggle the system property/startup flag viaversion.strict-error-handling1_20_5 to make the client ignore the errors again, but this will not work in 1.21 anymore