[Failed To Set Game Mode Error]

1 I searched on the error message and the search result was this thread. I didn't search for a specific game cos the error message comes with any game i try.
2 I want to use nexus mods because the one i want don't exist in the game mod menu

[Failed To Set Game Mode Error]

Oh sry didn't realize this thread was for another game. I searched the error message i get, and this thread was the search result. Reason for wanting to use vortex is because the mod i want to use doesn't exist in the game mod menu.

[Failed To Set Game Mode Error]

I get this game set mode error when i try activating Fallout 4. My path to my game is: D:\SteamLibrary\steamapps\common\Fallout 4. The path to the mods is : D:\SteamLibrary\steamapps\common\Fallout 4\Mods
What am i doing wrong?
The mods were installed from the game mod menu.