Whenever you cannot sign into the google account on the computer or smartphone. It means, there is something wrong with the user account or password. so here are the guide to get that fixed.
1. first of all, you need to check the username and password for your google account.
2. Go to the account settings, and click on the servers. Now check the Gmail server status. if you find anything wrong, you need to update it.
3. Sometimes, Gmail is not working on the mail applications because of the incorrect port number or server addresses. so you need to check the incoming and outgoing server details. if you find anything suspicious. you need to update that, and then try to access the mail account again.
4. Let's delete the current account from the Gmail and then re-add the mail account. If that does not work, you need to visit askprob blogs. there you will find the complete guide.