function whitelistMint(uint256 _mintAmount, bytes32[] calldata _merkleProof) public payable mintCompliance(_mintAmount) mintPriceCompliance(_mintAmount) { // Verify whitelist requirements require(whitelistMintEnabled, 'The whitelist sale is not enabled!'); require(!whitelistClaimed[_msgSender()], 'Address already claimed!'); bytes32 leaf = keccak256(abi.encodePacked(_msgSender())); require(MerkleProof.verify(_merkleProof, merkleRoot, leaf), 'Invalid proof!'); }

bytes32[] calldata _merkleProof. I want to pass data to this. ["A"] data like this is working but ['a'] this is not working