Can't open audio codec "aac" (0x11a) error

Audacity 3 Help Forum Windows
1

I’m getting this error when trying to export an mp3 file to AAC format.

Can’t open audio codec “aac” (0x11a)
The Codec reported an invalid parameter (EINVAL)

I guess that that error is coming from FFMPEG, since I also get this from Audacity

{
    "timestamp": 1643913267,
    "event_id": "04d603b9b78e31449d28ec0d085f8cbe",
    "platform": "native",
    "release": "audacity@3.1.2",
    "contexts": {
        "os": {
            "type": "os",
            "name": "Windows",
            "version": "10.0.19044"
        }
    },
    "exception": {
        "values": [
            {
                "type": "Warning",
                "value": "Unable to export.\nError FFmpeg:1008",
                "mechanism": {
                    "type": "runtime_error",
                    "handled": false
                }
            }
        ]
    }
}

And this is from the Diagnostic log

13:47:38: Error: File 'D:\Iens Files\Iens Music\Ringtones\IPhone\I Feel Lucky.m4a' couldn't be removed (error 32: The process cannot access the file because it is being used by another process.)
13:48:39: Error: Failed to load shared library 'avformat-58.dll' (error 126: The specified module could not be found.)
13:48:39: Error: Failed to load avformat-58.dll (error 5: Access is denied.)
13:48:39: Error: Failed to load shared library 'avformat-57.dll' (error 126: The specified module could not be found.)
13:48:39: Error: Failed to load avformat-57.dll (error 5: Access is denied.)
13:48:39: Error: Couldn't find symbol 'avio_context_free' in a dynamic library (error 127: The specified procedure could not be found.)
13:48:39: Error: Couldn't find symbol 'av_packet_alloc' in a dynamic library (error 127: The specified procedure could not be found.)
13:48:39: Error: Couldn't find symbol 'av_packet_free' in a dynamic library (error 127: The specified procedure could not be found.)
13:48:39: Error: Couldn't find symbol 'avcodec_free_context' in a dynamic library (error 127: The specified procedure could not be found.)
13:48:51: [aac @ 000001BC6B649CE0] Too many bits per frame requested

I’ve tried on 2 computers (both Win10 64bit) with Audacity 3.1.3, and on one of them with 3.1.2 as well. I’ve tried with a few mp3 files, and also a wav file.

Conversion to an AC3 file works.


Anyone have any ideas what I might be doing wrong?