If the game decides to load planet lib before Tenebris, the game crashes because planet lib adds the bioluminescent pack to the promethium research in data-final-fixes. It happened when, for some reason, my mod switch Tenebris and Planet lib order.

I made a bug report to planet lib, but maybe you could still check that other mods don't already put the bioluminescent pack to the tech for some reason before putting it yourself to prevent this kind of weird bug with other mods.

I had to get away from my computer to realize I was causing the bug by adding Tenebris science pack to the labs early so Scienceception could see it.

I'll solve the issue on my part. I still think my idea could be a good idea in case other mods play with science pack like mine. ^^'

Sorry for the false alarm.

I've made a fork of Tenebris that replaces this mod's cargo drop code with PlanetsLib's cargo drop code, and is designed with PlanetsLib in mind. Download it here. https://mods.factorio.com/mod/tenebris-prime