If while processing the login you are facing the problems then first check
that your device is connected via the internet or not if yes then once, try to
open the Yahoo account means if you are utilizing the Chrome then try now
try to open Yahoo on Opera or other browsers. If after doing so you are
unable to log in the account then just avail of the Yahoo Customer Service. https://www.deletemy-account.com/yahoo-customer-service-number/