A few PS4 and PS5 owners are currently facing error code WS-37400-4 on PSN. Some players are reporting that they could not sign in to PSN. We post some fixes and tips to fix error code WS-37400-4.
Read more details here.
Change your DNS
Make sure your PS4’s system software has the most recent update:
Clear your PS4’s cache:
A PSN backend update will fix the error WS-37400-4.