Hi all, I'm on a Mid 2014 MacBook Pro, running the latest macOS. Not sure when this started, but I can no longer download/install apps from the AppStore. When I click the "Download" button, it temporarily changes into "Installing", but after a few seconds returns to "Download" (instead of "Open"). Indeed, the app (any app) I clicked is not being installed. However, I can still download/install the apps that I purchased in the past (obviously they show a Cloud icon instead). Maybe the Mojave update changed some setting, I have no idea. All help is welcome.