Sorry, I meant F8. Mixed up my commands.
That at least points me in the right direction, but I don't see the error on my side. Perhaps something got corrupted in your download. Can you open the plugin in a text editor and look for the line that defines the playFocusedSound function? It'll be line 155, the one flagged in the first picture. It should look like this:
AudioManager.playFocusedSound = function(xCoord, yCoord, args, type, eventId = -1) {
If that's not what you see, let me know what you do.
And if the plugin is corrupted, try downloading it again.