What exactly is the issue here?

private void openTile(int i, int j) {

        if (isGameStopped) {
            return;
        } else if (gameField[j][i].isOpen) {
            return;
        } else if (gameField[j][i].isFlag) {
            return;
        }

        gameField[j][i].isOpen = true;
        countClosedTiles--;
        if (gameField[j][i].isMine) {
            setCellValueEx(i, j, Color.RED, MINE);
            gameOver();
        } else {

            score += 5;
            if (gameField[j][i].countMineNeighbors == 0) {
                setCellValue(i, j, "");
            } else {
                setCellNumber(i, j, gameField[j][i].countMineNeighbors);
            }

            List<GameObject> neighbours = getNeighbors(gameField[j][i]);
            boolean mined = false;

            for (GameObject o : neighbours) {
                if (o.isMine) {
                    mined = true;
                    break;
                }
            }

            if (!mined) {
                for (GameObject o : neighbours) {
                    if (!o.isOpen) {
                        openTile(o.x, o.y);
                    }
                }
            }
        }

        setScore(score);
        System.out.println(score);
        setCellColor(i, j, Color.GREEN);
        if (countClosedTiles == countMinesOnField && !gameField[j][i].isMine) {
            win();
        }
    }