Hello,
This is the "MV" version of the Nova Lighting Plugin. This plugin is compatible with RPG Maker MV, not MZ.
The "MZ" version of the plugin is not ready yet, however it will be very soon.
Viewing post in MV Nova Lighting Plugin comments
Yeah the only issue that I have with that is if I update the plugin and make it better, I want you to be able to download the newest version with no problem.
Sorry, its taking me a bit, I just released the final version of my game Killer Gin today! Its a 50+ hr epic RPG! (Made with nova lighting hehe)