Missing MonoGame.Framework

It seems my project can’t find the main MonoGame package, which, considering that I used the DesktopGL template, is odd. I’ve been added features from MonoGame.Extended, but don’t know if that has anything to do with it.

|Severity|Code|Description|Project|File|Line|Suppression State|
|Error|CS0234|The type or namespace name 'Xna' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)|Project1|C:\Users\jgedr\source\repos\Project1\Project1\Game1.cs|1|Active|

Does it show the MonoGame package normally, when you expand Dependencies/Packages, is there some warning icon? Maybe try nuget restore?