Can not access environment variable in Lambda function

I created a Nodejs Lambda function to use Environment variables based on: AWS Lambda Environment Variables - AWS Lambda

And I tried to access the environment with process.env but it does not work.

Here is my code:

exports.handler = async (event) => {
    console.log('The A varialbe is: ', process.env.A)
    console.log('\n')
    console.log('The all varialbes in process.env is: ', process.env)
    // TODO implement
    const response = {
        statusCode: 200,
        body: JSON.stringify('Hello from Lambda!'),
    };
    return response;
};

You can see I already set a variable here:

But process.env.A return undefined and in process.env it does not contain my variable A

You can see actual result here: