Go to the BP_SaveSystem and create a new variable called PlayerLoadSave and set it to a Bool.
Then copy the images below by adding the highlighted nodes, location at the tops of the screenshots.
Next go to the S_PlayerSave and add a new variable called LastLevel and set it to a String like the image below shows, then save.
Next play the game in editor, this will compile the project after the character loads in game you can exit the game. Then select the Save All button in the content browser and restart you project.
Then copy the video below, location at top of video.
Next copy the image below by adding the highlighted nodes shown in the image below, location at top of image.