Enabling the upload node by enabling the audio_upload property gives an error

### Prerequisites

- [x] I am running the latest version of ComfyUI
- [x] I have searched existing issues to make sure this isn't a duplicate
- [x] I have tested with all custom nodes disabled ([see how](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled))

### What happened?

custom node:

Unable to add node to comyui, the following error is thrown:

### Steps to Reproduce

custom node:

Unable to add node to comyui, the following error is thrown:

### How is this affecting you?

Crashes ComfyUI completely

### ComfyUI Frontend Version

1.26.6

### Browser

Chrome/Chromium

### Console Errors

```javascript

```

### Logs

```shell

```

### Additional Context

_No response_

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-5189-Enabling-the-upload-node-by-enabling-the-audio_upload-property-gives-an-error-2596d73d365081a5a094f84a0258f0ff) by [Unito](https://www.unito.io)