Well, the bundled instruments that you're having network issues are the sounds that come with notion, so without them or 3rd party VSTs you have no synths to make sound (my.presonus > products > notion 6 -- more details.) I checked and I have no issues downloading bundled sounds. You can use other VST's for sound, VST2s (VST3s are not compatible). To check things out a bit you might want to look at something like Spitfire Labs, they're free synths by Spitfire and some of them are pretty **** good
https://labs.spitfireaudio.com/. You would need to install the Spitfire plugin to browse and add different Labs Synths but it might be worth checking out.
