Why is Facebook saying 'session expired' and how do I fix it?

This is so annoying, right? I fixed it by updating my phone’s OS. Apparently, outdated software can cause these random errors. Go to your phone’s settings and check for updates.

Also, make sure your Facebook app is updated. Sometimes the "why is Facebook saying session expired" thing happens because of compatibility issues.

Hey, I had the same problem, and it was because of my antivirus software. It was blocking Facebook’s cookies for some reason. I added Facebook to the exceptions list, and the "why is Facebook saying session expired" error stopped.

If you’re using antivirus or a firewall, maybe check the settings and see if Facebook is being blocked.