New mp3 sounds not importing

I've been having a lot of trouble importing new audios recently. Every time I try and drop a sound in it gives me an error message along the lines of "cannot locate audio file." I've tried everything from installing older versions, deleting the program, restarting my computer, trying shorter audios, and using .wav/other audio formats. The weird thing is all of the older audios I've downloaded prior work perfectly fine, but now when I try importing a new one it doesn't work at all. Also I've been using the same website I always have to convert audio to mp3 (which is YouTube to mp3)  I'm just so frustrated at this point, I have no idea what could have happened or how to fix it