Cannot Login to Facebook 2019
Assuming you have the best login e-mail as well as password (and you're connected to the web) there's a few things that might be triggering your issues:
Cannot Login To Facebook
Are you obtaining an error message? If so, check the Facebook help page for explanations as well as fixes to known concerns.
See to it you don't have any expansions or antivirus programs running that are blocking Facebook.
Have you attempted removing the app's cache? Go to Settings > Applications > Facebook > Clear Cache. If this does not function you can attempt clearing data also and as a last resort uninstalling and also re-installing the application completely.
Did you join your telephone number? Make sure you enter the country code also when visiting.
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 classifying your Facebook emails as spam.
If you've recently enrolled in Facebook you might need to confirm your account first. If you've lately altered your password, make sure you're attempting to log in with the new password as well as not the old one.
If you're logging in using a browser, make sure you have cookies allowed which facebook.com is contributed to your list of secure websites.
See to it you have one of the most recent version of the Facebook app for Android.