TypeError[ERR_INVALID_ARG_TYPE]: The "key" argument must be of type string or an instance of Buffer, TypedArray, DataView, or KeyObject. Received null

Question

I'm trying to get my express app to connect to my local DB by I am getting an error when running my express app:

TypeError[ERR_INVALID_ARG_TYPE]: The "key" argument must be of type string or an instance of Buffer, TypedArray, DataView, or KeyObject. Received null

My DB configuration settings are used like so:

const herokuSSLSetting = { rejectUnauthorized: false };
// If local env variable is declared, turn ssl settings off
const sslSetting = process.env.LOCAL ? false : herokuSSLSetting;
const dbConfig = {
  connectionString: process.env.DATABASE_URL,
  ssl: sslSetting,
};

const app = express();

app.use(express.json()); //add body parser to each following route handler
app.use(cors()); //add CORS support to each following route handler

const client = new Client(dbConfig);

Now when I use my heroku DATABASE_URL, that works fine. I believe the issue is coming from when I declare LOCAL=true in my env file. If I remove that line when connecting to my local db, the error then becomes:

UnhandledPromiseRejectionWarning: Error: The server does not support SSL connections

This configuration has worked on my virtual workspace (for local and heroku db) so I think it may be a windows issue...

Other details:

• Running on windows
• Using postgres for my db
• Can connect to my local db via beekeeper by providing the user, password and default db