Marketplace

I want to access marketplace but first of all the icon doesn’t appear on my dock for facebook, secondly when I go onto the facebook marketplace facebook page when I click “learn more” the app crashes. When I click “buy” or “sell” and then click the link from there is says “couldn’t find link” or “couldn’t connect”. It would be great if you were to fix this please.

Piper?? about Facebook, v163.0