I have a 2017 MacBook Pro with the Touch Bar. So, for the past couple weeks, I have been unable to share anything via facebook using the Safari share button. It keeps instructing me to put in my facebook password. So, I hit continue, it takes me into System Preferences. I put in my password, it both accepts the password, and instructs me to enter it again. I've tried everything, including deleting Facebook from my System Preferences and re-entering my information. It still will not work.