Nuget Packet Issues - Yellow Triangles on all packages (not just Monogame) that return everytime I reopen project

See title. I’ve moved a project over from another laptop and the project is now full of nuget package errors where it says the namespace doesn’t exist. This goes beyond just monogame.

No matter what I do, the errors seem to return when I close and reopen the project.

I have no clue how to fix this. Please help.