Welcome to the community
if you create a new project also are you getting some error? if so the feeds are not accessible check the same
if not then that means your studio is on a lower version than the packages version also your orchestrator if it is lower version and on prem then might not have the latest versions which again is a very less chance
you can right click and click repair packages always
for the custom packages you need to make sure you upload them to orchestrator feed or add a local feed which contains those .nupkg files
cheers