i have the same problem but i fix it... the main problem is the mod itself.. some mod can't be activate at the same time.. for me i disable all the mod and plugin first.. then create a new game but don't delete your old save game.. after a new game is created, save your game of easy access later. now all your mod and plug have been disable right? next step is the open console (press ~ on your keyboard if you don't know) by the way i'm using pc version. after that, type in this command player.placeatme 0022cdf4 to summon a sentry bot near you to see if the bot is invisible or not, BE SURE TO DISABLE ALL YOUR MOD AND PLUGIN before doing this method. Then quit your game and open NMM to activate the mod and plug one by one to see if the mod are ok the use with other mod. Then open your new game and type in the command to summon sentry bot to see if the sentry bot is invisible or not. Hope this help cause it solve my sentry bot issue.
