I've created an ASP.NET Core project, i don't use anything DevEpxress components, but when i install or update the library from Nuget i got an error as shown below.
Severity Code Description Project File Line Suppression State
Error The local source 'C:\Program Files (x86)\DevExpress 20.2\Components\System\Components\Packages' doesn't exist.

Maybe I have different versions of DevExpress installed, and then I uninstalled the version of DevExpress. To fix errors when installing a Nuget package in a non DevExpress project you can do the following step.
In Visual Studio, you can go to Tools =>Nuget Package Manager =>Package Manager Settings.

Under Package Sources subgroup at left. Next, you need to uncheck or delete the missed references for Package Sources.