Since upgrading to Mojave when I plug in my iPad via a cable to my iMac I get a pop up that says it needs to install an update to connect to the iPad, but if I click install it fails and tells me the update isn't on the server. Checking the App store I find that this isn't working. If I click the Apple logo in the main menu bar then select App Store the screen blinks but doesn't load anything. If I click the App Store from Applications it loads the app store but none of the menu items on the left side like Discover, Create, Work, Categories, etc are there, it only shows one item which is Updates. I have tried deleting the caches and plists I even reinstalled Mojave from the CMD + R at boot up. Does anyone have any ideas where I can start to try and resolve this?