Facebook app doesn’t work on new ipad

My wife received a new iPad for her work and I purchased a brand new iPad Pro. We cannot login to the Facebook app on either of the new iPads. We have tried password reset, deleting the ap and restarting the iPads and NOTHING helps. All it says is password not valid when you try to login and ask you to reset PW or try again. Very frustrating to pay this much money for a new iPad and have it not work with all apps. I am also having the same issue with the X app. Please help APPLE or the developers of the social apps!!!