I've started looking at one of our core projects at work. On opening the solution Rider attempts a Nuget restore. It looks like this fails for all packages from our private repo. The error logs say the package wasn't found, but the solution loads OK for the rest of our team. If I access the index URL for the private repo I do get a JSON response. The Nuget source for the private repo is defined only in the Nuget.config file for the solution and that's where I get the index URL.