Uncaught TypeError: Cannot read properties of undefined (reading 'length')

The error is shown in console when I upload an ogg file in the example/decoder.html page.

Complete error:
```
Uncaught TypeError: Cannot read properties of undefined (reading 'length')
    at l.requestData (waveWorker.min.js:1:4109)
    at onmessage (waveWorker.min.js:1:6148)
```