Unable to browse NuGet packages until I open the package manager console


In recent days I’ve started having problems when trying to browse NuGet packages within VS2019 (e.g. by right-clicking a project -> Manage NuGet packages). I’ve no idea why this has started to happen all of a sudden, but this is what I see:-

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The strange thing is, if I open the "Package Manager Console" window, it seems to give something a kick and the browse window starts working (although the problem returns when I restart VS). I’ve tried repairing VS but to no avail. Anyone else seen this, or have a more permanent fix?

Source: Visual Studio Questions