I'm an idiot, everything worked for me. Thank you all!

I'm confused. What do I need to change in the "info.json" so that this error message doesn't appear?

Still, is there any way to enable SA functions without adding its contents? So that there would be no planets, platforms, or anything else?

So you need to come up with some other solution for growing trees, which will then have to be removed. Okay, thanks

The bottom line here is this: I am currently writing my own mod, which was originally designed for a game without the "space age" add-on, but whose compatibility will be added later. And at the same time, I want to use the mechanics of an agricultural tower in my mod (since I need to grow trees ...