Still the issue isn't resolved after doing everything - clear cache, data, uninstalled several times, still didn't do any good. The issue previously is that I cannot enter any meeting as it asked for a login, hence, valid login entered but it would say that it is already used. Well it asked to sign in not to sign up, therefore I entered the same google account I have been using. This time the issue is the app would not even stay open. After tapping the icon, it immediately close itself.