Cannot connect to facebook chat

[Mark Doliner]

Do you get an error message?

The instructions for Pidgin at
https://www.facebook.com/sitetour/chat.php are pretty good (with the
exception that you don't need to set the Connect Server in step 3, and
personally I think you're better of without it).

I don't know in what circumstances you need to use an App Password. I
suspect it's required if your Facebook account is configured to
require some sort of 2-factor authentication.