Blob is not defined

The error "Blob is not defined" usually occurs when you try to use the Blob object without importing it or declaring it in your code.

Blob is a built-in object in JavaScript that represents immutable raw data. To use it, you need to declare it in your code using the following syntax:

const myBlob = new Blob(data, options);

Here, `data` is an array of ArrayBuffer, ArrayBufferView, Blob, DOMString objects, or a mix of any of such objects. `options` is an optional object that specifies the MIME type of the data.

If you are still encountering the error, please make sure that you have imported the required libraries or modules in your code.