"InvalidCastException: Specified cast is not valid. (wrapper castclass)" ERROR

Hi, I'm trying to make a tetris game, and I'm getting this error in the spawn script

public class SpawnTetris : MonoBehaviour {

 public GameObject[] Tetrominoes;

 // Start is called before the first frame update
 void Start()
 {
     NewTetromino();
 }

 public void NewTetromino()
 {
     Instantiate(Tetrominoes[Random.Range(0, Tetrominoes.Length)], transform.position, Quaternion.identity);
 }

}