Buggered if I can find it !

Hi Everyone.
I'm trying to get Cayo Perico to load in single player on a legit Steam version and someone posted somewhere that disabling North Yankton is important because their created in the same area of the map . Any advice will be greatly appreciated.

Try using a trainer to remove all modifications. This worked for me even when I hadn't modified it in the first place!

This is what I've suddenly got:

System.MissingMethodException: Method not found: 'NativeUI.UIMenu NativeUI.MenuPool.AddSubMenu(NativeUI.UIMenu, System.String, System.String)'.
at PedSelector.PedSelector.AddonPedsMenu(UIMenu Menu)
at PedSelector.PedSelector..ctor()

I actually thought this was a simple subject until yesterday. Before the update I was running 353 add-on DLC's in the mods folder using: https://www.gta5-mods.com/misc/gta-5-gameconfig-300-cars
Post last update, this dropped to 222, then yesterday it dropped to 125 !
I have changed nothing. Re-downloading the Gamecofig solves nothing. So, for you to only have one add-on, try applying the above gameconfig. If that doesn't work, remove the 1x DLC folder you have. If the game runs you may have a damaged DLC. Download another and try that.