Save last stage and load it unreal engine 4

first my main blueprint loaded that show some menus widget. if user press start button then it load my game from game mode . i have create the array of all levels in game mode and load levels using current level increment in game instance. now i have create the save game blueprint from where i want to load the game/level where user end/exit the game. eg if user play last 12 level then load level13 when user next time open the game if savestate not save then start from first level. my function is not working. i save the level in player blueprint. and load the level in widget start button.

Have a similar issue, any solution???