Are you linked to the web? Haha, seriously however, are you?
Assuming you have the ideal login e-mail and also password (and also you're attached to the web) there's a couple of things that could be triggering your issues:
Facebook Login Page Problem
Are you obtaining an error message? If so, check the Facebook help page for descriptions and also fixes to recognized concerns.
Ensure you don't have any expansions or antivirus programs running that are blocking Facebook.
Have you tried getting rid of the app's cache? Most likely to Setups > Apps > Facebook > Clear Cache. If this does not function you can attempt clearing data too and also as a last resource uninstalling and also re-installing the application completely.
Did you sign up with your telephone number? Make certain you key in the country code too when logging in.
If the app is telling you to update your email address, this is more than likely due to the fact that your e-mail server is identifying your Facebook e-mails as spam.
If you have actually recently registered for Facebook you could require to confirm your account initially. If you have actually just recently changed your password, make certain you're trying to visit with the brand-new password and not the old one.
If you're visiting via a browser, make certain you have cookies enabled which facebook.com is included in your listing of secure sites.
Make certain you have one of the most recent variation of the Facebook app for Android.