Same problem.
I don’t know if this is because of VERSION or HOST or URL or FB account.
Last month it worked fine when:
1. Version 1.4
2. Old host
3. Set my web as mydomain.com in WP and FB
4. Used with an old facebook account
I recently moved my website from one host to Dreamhost and now everything works fine but not for posting COMMENTS in my timeline.
Current status:
1. Version 1.5
2. New host (Dreamhost)
3. Set my web as https://www.mydomain.com in WP, otherwise not working.
4. Using another facebook account and re-created the App.
Help, thank you.
