Update the tools using the package manager console:
Install-Package Microsoft.EntityFrameworkCore.Tools -Version 2.1.4
see this link https://www.nuget.org/packages/Microsoft.EntityFrameworkCore.Tools/
Update the tools using the package manager console:
Install-Package Microsoft.EntityFrameworkCore.Tools -Version 2.1.4
see this link https://www.nuget.org/packages/Microsoft.EntityFrameworkCore.Tools/