Cannot install AWSSDK Nuget package with Visual Studio package manager

EdEastwood

I am trying to install the Nuget AWSSDK package using Visual Studio but I am getting the following error:

"You are trying to install this package into a project that targets '.NETPortable,Version=v4.5,Profile=Profile78', but the package does not contain any assembly references or content files that are compatible with that framework."

It is strange because I have installed other AWSSDK packages (.Core, .CognitoIdentity, etc.) but the standard AWSSDK package will not install.
Anyone have any idea how to fix this?

EdEastwood

Still have not fixed this error. I would really appreciate the help!