Issue with blueprints

Hey, i got issue with this blueprints. I’m helping my firend make a clicker game and this is suposed to be (1) clicking on button to get points (it works) (2) if upgrade is bought its suppsed to give more points perclick (which doesn’t work).
I woudl appricate any help and explanation.


Blueprint runtime error: “Accessed None trying to read property CallFunc_Array_Get_Item”. Node: Branch Graph: EventGraph Function: Execute Ubergraph Main Widget Blueprint: MainWidget

Hi, so i fixed it.
I’ve changed button system and points