Blueprint Multiplayer Tutorial find sessions node seems faulty, how can I store sessions that has just being created?

I completed the blueprint multiplayer tutorial to the end, only to find out that the find sessions all of the logic is exactly alike, here is a screenshot when i went through the debug

i really don’t know what would cause it to stop working out of the blue, when I first put it together it worked, but when i saved and reopened the project the next day, this happens…help, please