Why can't I add facebook to my internet accounts

This is a relatively new occurance, I have been able to share items with facebook in the past. I keep getting a popup telling me to supply the password to my FB account, but when I do, I get the message that they are unable to verify account name or password. I logged out of FB and changed the password. Logged back in with no problems. Went to Sys Pref on MBair and added Facebook to internet accounts, choosing only the share in the details. When I attempt to share anything, be it from photos or even an existing FB post, I always get the message to supply FB password, but doing so gets me the same unverifiable message. Checking back my internet accounts in SYS Pref, I see the FB is not. Can anyone help?

MacBook air with OSX 10.13.4