Rendering with Movie File Out and MP3 codec

When choosing MP3 audio codec in my Movie File Out TOP and trying to record I get an error saying unable to open codec. I though MP3 was enabled by default? Is there something else I need to install? I’m on Windows 10.

I’ve kind of given up trying to render out both video and synced audio. I’m encountering too many issues

What file container are you trying to record into? .mov, .mp4? .mp4 doesn’t support MP3 audio.