when i have the link card in the link card slot and i press the button nothing happens.
i have the security link card in the security card slot

all the cards are valid, if you were wondering.
Also there is nothing in the logs.

Based on the image you linked you have found wrong issue tracker, you want the one linked on this page https://minecraft.curseforge.com/projects/modular-forcefield-system

ok sorry

Its no problem, likely going to be changing the name of the mod to remove confusion.