chainId is showing null for testnet when running the webapp in local browser

[dashDebasis123]

Frankly saying due to the absence of the Moralis server and app ID, it is difficult to finish the 15th unit of the tutorial where I am making a dapp. While using graphs we are using react moralis but I am not able to get the chain id for sepolia network and it is showing null for chainId.
when I searched for the solution they are saying to add app id and all (it is not available now in the Moralis )
please help me out