what software are you using? I use Eagle, i tried to re-do sparkfuns RGB footprint but i dont remember how any more,… andand to creating my own i don’t know how to get all the measurements right lol
the symbol and footprint has 6 pins so assuming you are using the same version of sparkfun.lbr that is not the problem
check the schematic see if the missing pin really has a connection or the wire just end end very close to it, the easiest is probably to delete and then redraw the wire