Why can't I place a "GameMode" BP down

In the UE4 editor, their is a “PlayerStart” which is where you start when you spawn. I at some point deleted it by accident, saved and re-opened UE4.

Now, I don’t understand why I can’t drag my “GameMode” BP (Has the Controller Icon) into the Editor.

Red - I don’t understand to why I can’t place it back down…

Green - I do have my Controller placed down, but I can’t get my character to spawn from it (First Person).

When I click “Play”, I will spawn from my current camera position in the Editor, and I will be using my “eric_Controller” BP which has things like double jump and sprint (Which is highlighted in green from my picture).

On the top left, click on “Basic” and search for “PlayerStart”. You can drag the PlayerStart into your level and your player will spawn there.