This version of the NoBlackSky plugin is the same version that you can find on the GitHub releases page.
This version fixes issues from Spigot 1.17 that adds CUSTOM world environments.

Features

(1.17+) Custom worlds
From Spigot 1.17, the custom world environments have been added. A custom world is similar to the overworld but with a different configuration such as biomes, max/min-height, etc.
This world is denoted by the CUSTOM environment and it is different from the NORMAL environment (overworld).
By enabling this property, you'll include custom worlds.

Debug-Mode
By enabling this new configuration property, a debug.log file will be created into the plugins/NoBlackSky folder.
Debug logs will be printed on the server console and appended on this debug file.
This file is required when a bug or an issue is reported. By default, this value is set to false.