Ugh, I feel you! The facebook app session expired thing has been happening to me for days now.
I read somewhere that enabling two-factor authentication might fix it. I tried it, and it actually worked for me!
Go to Settings > Security and Login > Two-Factor Authentication and turn it on. Worth a shot!
I read somewhere that enabling two-factor authentication might fix it. I tried it, and it actually worked for me!
Go to Settings > Security and Login > Two-Factor Authentication and turn it on. Worth a shot!