tech help assistance » Need Help on FB Account

A few months back I was not able to log in to my FB account. In spite of all the correct information, the access was denied. Since it was my very old personal account I did not give up and kept on trying with several passwords that I could remember.

Past a few days back somehow I could recover my account but every time I am trying to access it through the FB app it shows me 200 error permission denied. I tried clearing cookies from the app, reinstalled the app yet it is the same.

Whereas when I try to log in from the webpage I am able to log in.

Can someone help me with this? I have emailed my issues to FB service yet no response.