"linker"

I apologize before hand. SINCERELY I do. I am aware discussions are serious business. This is not serious but interesting. I have a question that perhaps some of you can assist in finding the answer to. It pertains (of course) to our dearest Liam. Was I the only one to recieve the post where he explains that, and I quote, “the linker was not working last time I tried” ? Does any one here have a clue as to what exactly that means???

OY 'VE !!!
It is all far beyond the grasp of my diminutive comprehension.