How to debug a parsererror in solidity

Question

I need assistance here. I don't know why I keep having this error. I have added the ";" but I keep seeing the parser error message. I am supposed to compile and deploy the contract.

pragma solidity  ^0.5.7;

contract Coin {
    address public minter;
    mapping(address => uint) public balances;

    event sent(address from, address to, uint amount);

    constructor() {
        minter = msg.sender;
    }

    function mint(address receiver, uint amount) public {
        require(msg.sender == minter);
        balances[require] += amount;
    }

    error InsufficientBalance(uint requested, uint available);

    function send(address receiver, uint amount) public {
        if(amount > balances[msg.sender])
           revert InsufficientBalance({
                requested: amount,
                available: balances[msg.sender]
            });    
        
        balances[msg.sender] -= amount;
        balances[receiver] += amount;
        emit sent(msg.sender, receiver, amount);
    }
}

Answer 1

Change your compiler version in your smart contract from:

pragma solidity ^0.5.7;

to

pragma solidity ^0.8.4;

Another problem that I identified is the struct in this instruction:

balances[require] += amount;

you must to change the key value of balances mapping with the address parameter passed it into the mint() function, in this way:

balances[receiver] += amount;