How to fix 'Firebase error: Incorrect database name' - firebase

Question

I am in the middle of making a quick web app and set up a client-side firebase connection. Following the docs, I added the below code to my index.html before any other scripts are loaded in my head. However, whenever I try to get any kind of information from the database, I get the following error: #firebase/database: FIREBASE WARNING: Firebase error. Please ensure that you spelled the name of your Firebase correctly (...)
I've tried following the docs about setting up a web app again, and copied the full config info. However, I keep getting the same error. I've checked that my database name is correct in the Firebase console.
<script src="https://www.gstatic.com/firebasejs/5.8.2/firebase-app.js"</script>
<script src="https://www.gstatic.com/firebasejs/5.8.2/firebase-database.js"></script>
<script>
// Initialize Firebase
var config = {
apiKey: "...",
authDomain: "...",
databaseURL: "...",
projectId: "...",
storageBucket: "...",
messagingSenderId: "..."
};
firebase.initializeApp(config);
</script>
I appreciate your time and suggestions.

Answer 1

Ensure you have typed correctly with extension:
<script src="https://www.gstatic.com/firebasejs/5.8.2/firebase.js"></script>
<script>
// Initialize Firebase
// TODO: Replace with your project's customized code snippet
var config = {
apiKey: "<API_KEY>",
authDomain: "<PROJECT_ID>.firebaseapp.com",
databaseURL: "https://<DATABASE_NAME>.firebaseio.com",
projectId: "<PROJECT_ID>",
storageBucket: "<BUCKET>.appspot.com",
messagingSenderId: "<SENDER_ID>",
};
firebase.initializeApp(config);
</script>