Where is the block in the machine?

My Nespresso Citiz stopped making coffee. I descaled it according to directions with descaling powder. I removed airlock using YouTube instructions. The water goes through without a capsule. Once I put a capsule in, there seems to be a blockage and the machine only drips a few drops then stops. I’ve been using a stainless steel reusable capsule for several months now with no problem. I made sure holes in the capsule were not blocked and I also tried putting in less coffee in the pod.