Hi there,
I've recently installed Movie Studio Platinum 16. When I try to import any MP4 file, I get a dialog box with a spinning load indicator for a while, followed by the following error message:
"The activation of AAC (MC failed. If you are using the program as a guest, please repeat the activation procedure with administrator rights."
I'm running Movie Studio with admin rights. I've also tried deactivating Movie Studio and then running it again as admin, so that the activation/registration process happens with admin rights. I'm also connected to the internet. None of this seems to have any effect.