Is there someone who would be willing to help me?

Of course @kevin happy to help.

Have you seen this thread? It sounds very similar to the issue you’re describing:

There’s been a new action for Dropbox that has been published since the video was released. It might help with this /tmp directory issue.

But if you’re not using Dropbox, please share the configuration of the step that is storing the .mp3 file. There might be some misconfiguration there.

Thanks,