i need help with my board manager coding ASAP

i keep getting this error code

Assets/Scripts/BoardManager.cs(71,15): error CS1525: Unexpected symbol `Vector3’

Coding:

using UnityEngine;
using System;
using System.Collections.Generic;
using Random = UnityEngine.Random;

public class BoardManager : MonoBehaviour 
{
[Serializable]
public class Count
{
	public int minimum;
	public int maximum;
	
	public Count (int min, int max)
	{
		minimum = min;
		maximum = max;
	}
}

public int columns = 8;
public int rows = 8;
public Count wallCount = new Count (5,9);
public Count foodCount = new Count (1,5);
public GameObject exit;
public GameObject[] floorTiles;
public GameObject[] wallTiles;
public GameObject[] foodTiles;
public GameObject[] enemyTiles;
public GameObject[] outerWallTiles;

private Transform boardHolder;
private List <Vector3> gridPositions = new List <Vector3> ();

void InitialiseList()
{
	gridPositions.Clear();
	
	for (int x = 1; x < columns - 1; x++)
	{
		for (int y = 1; y < rows - 1; y++)
		{
			gridPositions.Add(new Vector3(x,y,0f));
		}
	}
}


void BoardSetup ()
{
	boardHolder = new GameObject ("Board").transform;
	
	for (int x = -1; x < columns + 1; x++)
	{
		for (int y = -1; y < rows + 1; y++)
		{
			GameObject toInstantiate = floorTiles[Random.Range (0, floorTiles.Length)];
			if (x == -1 || x == columns || y == -1 || y == rows)
				toInstantiate = outerWallTiles[Random.Range (0, outerWallTiles.Length)];
			
			GameObject instance = Instantiate(toInstantiate, new Vector3 (x,y,0f), Quaternion.identity) as GameObject;
			
			instance.transform.SetParent(boardHolder);
		}
	}
}

Vector3 RandomPosition()
{
	int randomIndex = Random.Range (0, gridPositions.Count)
Vector3 randomPosition = gridPosition [randomIndex];
	gridPositions.RemoveAt (randomIndex);
	return randomPosition;
}

void LayoutObjectAtRandom(GameObject[] tileArray, int minimum, int maximum)
{
	int objectCount = Random.Range (minimum, maximim + 1);
	
	for (int i = 0; i < objectCount; i++)
	{
		Vector3 randomPositions = RandomPosition();
		GameObject tileChoice = tileArray[Random.Range (0, tileArray.Length)];
		Instantiate (tileChoice, RandomPosition(), Quaternion.identity);
	}
}

public void SetupScene (int level)
{
	BoardSetup ();
	InitialiseList ();
	LayoutObjectAtRandom (wallTiles, wallCount.minimum, wallCount.maximum);
	LayoutObjectAtRandom (foodTiles, foodCount.minimum, foodCount.maximum);
	int enemyCount = (int)Mathf.Log (level, 2f);
	LayoutObjectAtRandom (enemyTiles, enemyCount, enemyCount);
	Instantiate (exit, new Vector3 (columns - 1, rows - 1, 0f), Quaternion.identity);
	
}

}

A missing semicolon at the end of the line before it

int randomIndex = Random.Range (0, gridPositions.Count)