If I listen to my own audios that I just sent before wil it will not work, the other or my old audios I can hear properly!
But I hear my comes the message "Sorry, this media file does not exist on your internal memory"
I have a Huawei P10 mate if that's important.
Or did you have a microSD card? Maybe the voice messages were stored on it and the mobile phone can't access it because it is not there or is broken or has a loose connection.
Have one and have already checked, it is spotless, the phone checks it even when restarting and finds nothing, all pictures of the SD card, I can also call, etc.
Do you have enough free space? Because it may also be that the phone has not saved the voice messages because of lack of space. If not, you can transfer your messages secure uninstall (chat backup) and What's app and install again. This usually solves many problems. Does not help, you can set up the Not What's app again completely.
Actually, I would have enough, well, now I have noticed that I can't hear voice messages over 1 second (of me) but under it already…