Resolved SOLVED - 'Player is inactive' error on input - but it's active and working fine

Hi, I'll start with the context of what I'm trying to do.

• I'm making an offline/local multiplayer battle mode for my 2D platformer.
• Unity 2020.3.17f1, using the new input system.
  
• On the player select scene, I have a PlayerConfigManager game object with a script of the same name and a player input manager with 'join players when button is pressed' ticked.
• The first time any controller or keyboard presses something, it spawns a new 'PlayerConfiguration(clone)' object as a child of the PlayerConfigManager, with a SpawnPlayerSetupMenu script that spawns a small selection menu for that player where they can select their character colour.
• The PlayerConfiguration(clone) also has a Player gameObject as a child, which is the object of the actual character. During the player select screen, this child Player object is set to inactive (so the object is greyed out on the hierarchy).
• When the players select their colour and all have chosen 'ready', the in-game scene starts and the SpawnPlayerSetupMenu script uses SetActive(true) to set its own child player object as active.

Here's where it gets weird (and more related to the input system):

• Everything 'works' completely fine. The players all spawn and can use all their moves correctly.
• Yet, for some reason, every time player 1 (regardless of controller/keyboard assigned) does a move e.g. jump or attack (which is meant to start a coroutine), it throws an error: Coroutine 'JumpButtonDown' (or whatever) couldn't be started because the game object 'Player' is inactive!"
• Other players don't get this, only player 1, and it's weird because the coroutine it says can't run is definitely running - if I put print("working") inside the coroutine then that print runs. And the move gets executed as intended.
  
• I'm 99% sure the Player object is active. It's no longer greyed out in the hierarchy since I set it to active, its parent/root are active, and it shows as becoming active when I use activeSelf and activeInHierarchy.

I also think it might be input system related because the only move that doesn't throw the error is movement (i.e. walking left/right or pressing up/down to enter doors or crouch). These movements are different from the other moves as they are set up as 1D axis values with positive and negative values 1 to -1, while other moves are value action types but without an axis.

They are also scripted a bit differently. Horizontal movement is scripted like this:

Code (CSharp):

1. public void OnMoveHorizontal(InputAction.CallbackContext context)
2.     {
3.         if (playerInputAllowed)
4.         {
5.             inputX = context.ReadValue<float>();
6.             inputX = Mathf.RoundToInt(inputX);
7.         }
8.     }

While other moves are scripted like this (jumping, in this case):

Code (CSharp):

1. public void OnJump(InputAction.CallbackContext context)
2.     {
3.         if (context.performed && playerInputAllowed)
4.         {
5.             StartCoroutine("JumpButtonDown");
6.         }
7.  
8.         if (context.canceled && playerInputAllowed)
9.         {
10.             StartCoroutine("JumpButtonUp");
11.         }
12.     }

I've tried everything I've managed to find through research for multiple hours, plus what I could think of trying myself (with my limited development knowledge - I'm better at game design). If anyone has any ideas of what's wrong or what else I can try, please let me know. Also tell me if there's anything else you'd like me to confirm. Thanks!

 

I had a similar problem. I dont know why this happens. I think its a bug but anyway I just check if the player is not null before calling the method

Code (CSharp):

1.     public void OnJump(CallbackContext context)
2.     {
3.         if (player != null)
4.         {
5.              player.Jump(context);
6.         }
7.     }

 

Thank you so much! That worked perfectly. I do wonder why the issue happens but I'm just happy it's gone