curious, I was pretty sure I already put https. anyway no difference. try with whatever account you want, if it works, it will works with mine.
Before I replied you yesterday, I already help you updated those missing https protocol into your Facebook app, you can check my screenshot here :
http://take.ms/3m2wV
did you look at my apps ?
I re-check again just now, I also noticed one part I haven't update to https protocol, you can check my screenshot here :
http://take.ms/tz17w , can you try update to https and save it, try click sign in via Facebook button from Easyblog backend Facebook autopost configuration page and see how it goes?
If still can't work, I would suggest you create a new app from your Facebook developer tool, once you have done, please assign my Facebook user account to your new facebook app user roles section, so I can able to help you configure all the setting from your app.
Because I realised you have used your same Facebook app configured jfbconnect stuff as well, it might be cause the issue.
Looking forward of your response.