Are you connected to the web? Haha, seriously however, are you?
Thinking you have the appropriate login e-mail and password (as well as you're attached to the internet) there's a few points that may be creating your issues:
My Facebook Account Is Not Logging In
Are you getting an error message? If so, inspect the Facebook help page for explanations as well as fixes to recognized issues.
Ensure you don't have any kind of extensions or antivirus programs running that are blocking Facebook.
Have you attempted getting rid of the application's cache? Most likely to Setups > Applications > Facebook > Clear Cache. If this doesn't work you can try cleaning information too and as a last option uninstalling and re-installing the app completely.
Did you register with your telephone number? See to it you key in the country code too when visiting.
If the app is telling you to update your email address, this is probably due to the fact that your email server is identifying your Facebook e-mails as spam.
If you have actually lately registered for Facebook you might need to verify your account first. If you've lately altered your password, ensure you're attempting to log in with the new password and also not the old one.
If you're logging in by means of a web browser, make certain you have cookies allowed which facebook.com is contributed to your list of secure websites.
Make sure you have one of the most recent version of the Facebook app for Android.
