Hi Hammondfra
I had a quick look to see if anyone answered you. Didn't see anything [but my eyes are not what they once used to be

].
I think you are trying to upload using the vBulletin Plugin system. If so, try uploading where you should be - in the Product system. This fantastic Player is not a plugin but a product. If you try to upload a product via plugin, you will get that error message you have reported.
I hope that sorts it for you but accept no liability whatsoever for your following my advice. As stated elsewhere, I am not even a coder's bootlace, let alone a coder.
Biggles