Conventionally, access tokens for users on Facebook can become invalid for some reasons. Unlike in developers mode, this issue of expired access token can be experienced on Facebook for Android either when you logged out of either Facebook or Messenger, when user changes password.
In this post, I will guide you on a simple step to fix the “Error validating access token: Session does not match current stored session. This may be because the user changed the password since the time the session was created or Facebook has changed the session for security reasons”
Fixing “Error validating access token: Session does not match current stored session”
Logging out of Facebook mobile app for Android may not necessarily fix this since it still keep some log data as cache. Your Facebook reactions will turn blank. To fix this effectively, you have to head over to Application Manager for Android.
Here are the navigation shortcut for devices
|Clear Facebook app data /ChuksGuide|
Infinix|Tecno|Gionee|etc => Settings > Apps > Downloaded app > Facebook
Samsung => Settings > Device > Application Manager > Downloaded > Facebook
Now tap on “CLEAR DATA” to wipe off any trace of Facebook logs and expired cached sessions. When you are done with this, go back to login to Facebook.
Your account should now come back as before.