Good morning and thank you for posting on the Final Fantasy XIV Technical Support Forums.

My first suggestion is to try connecting with a wired Ethernet cable if possible. This will help with the stability of your connection.

Additionally, there are some settings you should configure on the PS4 itself. Please make sure that "Cookies" and "JavaScript" are ENABLED on the PSN Browser. This can be done by going to the web browser on the PS4, press the options button, then go to settings. The options for Cookies and Javascript will most likely be checked, uncheck them and then recheck them.

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!