SkyBlock v3

[Seadragon91]

This means that someone somewhere is trying to query blocks in chunk but has forgotten to check the Y coord. Compile a debug version of the server and try that, it will assert (break into debugger when running under one, or simply crash and possibly create a crashdump) when this error occurs, this way you'll find out the stack trace that leads up to the problem.

I created a debug version with Visual Studio and tested it. Same errors occurs, no crash.