I read this as you trying to remove the chainset?
I have this issue when removing my RF chainsets.
Your crank puller is just going right through the hole. You need to put a one euro cent (emphasis on the one cent, the tiny coin) in the section exposed when you’ve removed that bolt from the drive side crank arm, then put the crank puller on.
the puller should put force on the coin, pushing the arm off the non drive spindle. This is what works for me, but BE GENTLE.