Python code keeps failing. Can someone help me locate the issue

Python code keeps failing. Can someone help me locate the issue? Thank you.

class Mancala:

  def __init__(self):

       """Initialize the game."""

       # create the board

       self.board = [0] * 14

       # initialize the seed count

       self.seed_count = 48

       # player 1 starts the game

       self.current_player = 1

   def create_players(self):

       """Create the two players."""

       # player 1 is the human player

       self.player1 = Player("Human", 1)

       # player 2 is the computer player

       self.player2 = Player("Computer", 2)

   def print_board(self):

       """Print the current state of the board."""

       print("+-----+-----+-----+-----+-----+-----+")

       print("|  {}  |  {}  |  {}  |  {}  |  {}  |  {}  |".format(*self.board[6:12]))

       print("+-----+-----+-----+-----+-----+-----+")

       print("|  {}  |  {}  |  {}  |  {}  |  {}  |  {}  |".format(*self.board[6:12]))

       print("+-----+-----+-----+-----+-----+-----+")

   def return_winner(self):

       """Return the winner of the game."""

       # player 1 wins if the game is over and player 2 has no more seeds

       if self.is_game_over() and self.board[6] == 0:

           return self.player1

       # player 2 wins if the game is over and player 1 has no more seeds

       if self.is_game_over() and self.board[13] == 0:

           return self.player2

       # otherwise, the game is not over yet

       return None

   def play_game(self):

       """Play the game."""

       # create the players

       self.create_players()

       # print the initial state of the board

       self.print_board()

       # while the game is not over, keep playing

       while not self.is_game_over():

           # get the next move from the current player

           move = self.current_player.get_move(self)

           # make the move

           self.make_move(move)

           # print the current state of the board

           self.print_board()

           # check if the game is over

           if self.is_game_over():

               # if so, return the winner

               return self.return_winner()

           # switch to the other player

           self.current_player = self.player1 if self.current_player == self.player2 else self.player2

   def make_move(self, move):

       """Make a move in the game."""

       # get the start position and end position for the move

       start = move[0]

       end = move[1]

       # get the number of seeds to move

       seeds_to_move = self.board[start]

       # clear the start position

       self.board[start] = 0

       # move the seeds

       for i in range(start+1, start+seeds_to_move+1):

           self.board[i % len(self.board)] += 1

       # check if the last seed was moved into the player's mancala

       if self.current_player.mancala_position == end:

           # if so, the player gets another turn

           return

       # check if the last seed was moved into an empty pit on the player's side

       if self.board[end] == 1 and end in self.current_player.pit_positions:

           # if so, the player captures the seeds in the opposite pit

           captured_seeds = self.board[self.get_opposite_pit(end)]

           self.board[self.get_opposite_pit(end)] = 0

           self.board[end] = 0

           self.board[self.current_player.mancala_position] += captured_seeds

           return

       if self.board[end] == 1 and end not in self.current_player.pit_positions:

           return

       self.current_player = self.player1 if self.current_player == self.player2 else self.player2

   def get_opposite_pit(self, pit_position):

         return len(self.board) - pit_position - 1

   def is_game_over(self):

        return self.board[6] == 0 or self.board[13] == 0

class Player:

   def __init__(self, name, player_id):

        self.name = name

       self.id = player_id

       self.mancala_position = 6 if self.id == 1 else 13

       self.pit_positions = list(range(0, 6)) if self.id == 1 else list(range(7, 13))

   def get_move(self, mancala):

       possible_moves = mancala.get_possible_moves()

       if len(possible_moves) == 0:

           return None

       print("{}, please enter a move: ".format(self.name))

       print("Possible moves: {}".format(possible_moves))

       move = input()

       return move

def main()

   game = Mancala(

   winner = game.play_game(

   print("{} wins!".format(winner.name))

if __name__ == "__main__":

   main()