I have a similar problem. When I click convert audio to keyframes it shows the audio amplitude layer but there are no key frames in graph. I have checked forums about this and only found 1 other with the same problem. I am using AE CC 2017 version 188.8.131.52. I have tried mp3 and wave file. I can see the wave form in audio by pressing LL. Everything seems right. Can anyone help?
Can we see some screenshots of your process?