Took a look at your picture of the setup and noticed that you are treating a prototype board as a breadboard.
Yes on a breadboard you can plug your dupont wires in to make connections but to just push the dupont wires
into the thru holes of the prototype board is asking for trouble. A secure connection will not be made.
Either transfer to a breadboard or add headers to the prototype board for everything to plug into or just solder
everything on the prototype board.