Yahoo Mail is one of the reputed names in the domain of the email service provider. It has received a huge reputation in the market with its brilliant features and performances. It has different plans for its valuable users. Apart from that, it has immense storage space; systematic; easy UI; and much more. Time and now the user have spoken about their dissatisfaction while using the email service for their purposes. Yahoo Mail error code 4 appears on the screen when there is a possibility of any transitory issue. And later, freezes the page for some time. It often termed as a temporary issue which means it will get resolved automatically. The main reason for their occurrences is due to the poor internet connection; Yahoo Mail updating issue; compatibility issue with the OS and browser; and much more. To fix the problem entirely, you need to look online help or look for the Yahoo Customer Service to get instant support on your problems.