[Bug] Save function not working - editor.save is not a function

Calling the .save() function does not work, with the console error saying
`Uncaught TypeError: editor.save is not a function`

I have tried several ways to to initialise editor.js, even with the examples from the docs (https://editorjs.io/saving-data), it still displays the error.

```
const editor = new EditorJS();

editor.save().then((outputData) => {
console.log('Article data: ', outputData)
}).catch((error) => {
console.log('Saving failed: ', error)
});
```

The only other JS library being used is jQuery.

Any thoughts on how I can get this working, or help debug?
Thanks

---

Editor.js version: 2.17.0

Plugins you use with their versions:
Header
Quote
Delimiter