I can't trade with Piglins

I can't trade with Piglins

I thought that I was supposed to be able to trade with piglins but I can’t

When I look at it, it shows a button that says “open” but when I press it nothing happens

How it happened:
1.find a Piglin
2. look at it
3. press the open button above the hotbar
4. NOTHING HAPPENS