ClassNotFoundException CallbackTask

Do you know what you are writing? Your SAT class's constructor requires a `Main` as the argument, but you are passing an array.
First of all do you know what __construct means? Do you know what [$this, "gameTask"] means in terms of programming? Do you know what class SAT means?
If you don't understand them, my suggestion is, delete all the code and start writing according to what you understand. If you don't understand, learn; copying isn't an effective way of learning in this case.

 

It is not the API. It is fundamental knowledge about PHP argument passing. And, this is PMMP forums, not PHP forums. Please go to somewhere else like StackOverflow if you want to ask about pure progrmaming questions not related to PocketMine.

Actually this thread didn't need to exist in the first place if there weren't fundamental PHP questions. This thread is no longer meaningful for any future readers due to its irrelevance from the PMMP API, as well as that we have already made it clear that CallbackTask shall be deprecated forever. Locked.