SQL network interface error 26 error locating server Update-Database in .NET Core

I’m getting this error while running command Update-Database from the package manager console:

SQL network interface error 26 error locating server Update-Database in .NET Core

I’m getting this error while running command Update-Database from the package manager console:

Net.Core 6. Error 500 or 404 when trying to connect localhost to the MSSQL DB by string in appsettings.json

Net.Core 6.