I get this error code in the logs:
Protocol error: error=Internal server error errorCode=M_UNKNOWN softLogout=false retryAfterMs=0
connections (means friend list) and picture upload in chat does not work
I have the same problem , still no solution
The Chat Service are working fine for me.
Please share your TS Chat log and your TeamSpeak Client Log.
That’s the path on Windows
%localappdata%\TeamSpeak\Logs\Default
When the log is too long, then please paste it one pastebin.com and share the link.
I have the same problem , still no solution. Some friends in Germany have this error.
[2024-07-23 21:37:57.058] [info] TSBindingBrowserTSChat ctor
[2024-07-23 21:37:57.058] [info] TSChat library version: 1
[2024-07-23 21:37:57.990] [info] TSBindingBrowserTSChat::create scHandlerId=0 server_identifier= specifier= endpoint=CENTRAL
[2024-07-23 21:37:57.991] [info] Save data path: server_identifier=chat-3.tmspk.net specifier=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 => C:\Users\msiko\AppData\Local\TeamSpeak\Cache\Default\tschat\NjFhMTU4MDQ5YjZkYTg2MmMzMTdkMTIwN2U1ODczYzk
[2024-07-23 21:37:57.991] [info] Matrix client create: matrixHost=chat-3.tmspk.net
[2024-07-23 21:37:57.998] [info] Failed to restore store from save data: invalid login data
[2024-07-23 21:37:57.998] [info] Creating fresh store
[2024-07-23 21:37:57.998] [info] new crypto account on init - fresh
[2024-07-23 21:37:57.998] [info] created new group session storage
[2024-07-23 21:37:58.006] [info] connect: ts_chat_id=1 displayname=MiloEagle presence=online
[2024-07-23 21:37:58.182] [warning] TSChat_Connect failed: Protocol error: error=Internal server error errorCode=M_UNKNOWN softLogout=false retryAfterMs=0
[2024-07-23 21:37:58.182] [error] Connection failed: err=1
[2024-07-23 21:37:58.189] [info] stop: ts_chat_id=1
This was the Issue
Hope for you the Issue is resolved for you. 
looks like the server/service is back (for me)
- Hamburg/GER grüßt den Rest der Welt
happy olympic games
