An error occurred when the server switched over the region. Procedure

[Lain1999]

The details of the error are as follows:
Unhandled exception. System.InvalidOperationException: Queue empty.
at System.Collections.Generic.Queue1.ThrowForEmptyQueue() at System.Collections.Generic.Queue1.Dequeue()
at MinecraftClient.Protocol.Handlers.Protocol18Handler.HandlePacket(Int32 packetID, Queue`1 packetData)
at MinecraftClient.Protocol.Handlers.Protocol18Handler.Updater(Object o)
at System.Threading.Thread.StartHelper.Callback(Object state)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.Thread.StartCallback()

[milutinke]

We can't pinpoint the exact point of an error in the code.
Can you clone the repository and run it manually with dotnet run and then copy the log here?
Here are instructions on how to do it: https://mccteam.github.io/guide/installation.html#building-from-the-source-code

(Note: instead of running the build command from the manual/documentation, use the command I provided above)

Also, what client build are you using and which Minecraft Version are you playing on?